Gunboats and Sloops

[Kaiser Kirk]

Dragonfly, Parthian Rivirine Gunboat laid down 1894
Refurbished 1919.

Displacement:
   250 t light; 272 t standard; 284 t normal; 293 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (161.95 ft / 157.48 ft) x 26.25 ft x (3.94 / 4.04 ft)
   (49.36 m / 48.00 m) x 8.00 m  x (1.20 / 1.23 m)

Armament:
      1 - 4.72" / 120 mm 40.0 cal gun - 50.71lbs / 23.00kg shells, 200 per gun
     Breech loading gun in deck mount, 1889 Model
     1 x Single mount on centreline, forward deck centre
      1 - 4.65" / 118 mm 20.0 cal gun - 44.09lbs / 20.00kg shells, 300 per gun
     Breech loading gun in deck mount, 1889 Model
     1 x Single mount on sides forward
      8 - 0.59" / 15.0 mm 74.0 cal guns - 0.11lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1886 Model
     4 x Twin mounts on side ends, evenly spread
      4 raised mounts
      2 - 1.77" / 45.0 mm 40.0 cal guns - 2.64lbs / 1.20kg shells, 300 per gun
     Quick firing guns in casemate mounts, 1889 Model
     2 x Single mounts on sides, forward deck aft
      Weight of broadside 101 lbs / 46 kg

This is a casement armor clad, able to defeat small arms

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.79" / 20 mm     55.12 ft / 16.80 m   6.56 ft / 2.00 m
   Ends:   Unarmoured
   Upper:   0.39" / 10 mm     55.12 ft / 16.80 m   9.19 ft / 2.80 m
     Main Belt covers 54 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.39" / 10 mm         -               -
   2nd:   0.39" / 10 mm         -               -
   3rd:   0.39" / 10 mm         -               -
   4th:   0.39" / 10 mm         -               -

   - Armoured deck - single deck: 0.39" / 10 mm For and Aft decks

   - Conning towers: Forward 0.59" / 15 mm,  Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 163 ihp / 122 Kw = 9.50 kts
   Range 1,600nm at 6.00 kts
   Bunker at max displacement = 20 tons (100% coal)

Complement:
   33 - 44

Cost:
   £0.017 million / $0.067 million

Distribution of weights at normal displacement:
   Armament: 12 tons, 4.1 %
   Armour: 44 tons, 15.6 %
      - Belts: 25 tons, 9.0 %
      - Armament: 6 tons, 2.0 %
      - Armour Deck: 13 tons, 4.4 %
      - Conning Tower: 1 tons, 0.2 %
   Machinery: 31 tons, 10.8 %
   Hull, fittings & equipment: 161 tons, 56.8 %
   Fuel, ammunition & stores: 33 tons, 11.7 %
   Miscellaneous weights: 3 tons, 1.1 %
      - Above deck: 3 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,615 lbs / 733 Kg = 30.6 x 4.7 " / 120 mm shells or 1.1 torpedoes
   Stability (Unstable if below 1.00): 1.34
   Metacentric height 1.1 ft / 0.3 m
   Roll period: 10.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 80 %
         - Recoil effect (Restricted arc if above 1.00): 0.38
   Seaboat quality  (Average = 1.00): 1.60

Hull form characteristics:
   Hull has low forecastle, low quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.610 / 0.613
   Length to Beam Ratio: 6.00 : 1
   'Natural speed' for length: 12.55 kts
   Power going to wave formation at top speed: 31 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 12.00 degrees
   Stern overhang: 3.28 ft / 1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   33.00 %,  5.58 ft / 1.70 m,  5.58 ft / 1.70 m
      - Forward deck:   17.00 %,  13.78 ft / 4.20 m,  13.78 ft / 4.20 m
      - Aft deck:   18.00 %,  13.78 ft / 4.20 m,  13.78 ft / 4.20 m
      - Quarter deck:   32.00 %,  5.58 ft / 1.70 m,  5.58 ft / 1.70 m
      - Average freeboard:      8.45 ft / 2.58 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 53.1 %
      - Above water (accommodation/working, high = better): 242.7 %
   Waterplane Area: 3,051 Square feet or 283 Square metres
   Displacement factor (Displacement / loading): 198 %
   Structure weight / hull surface area: 41 lbs/sq ft or 198 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.88
      - Longitudinal: 2.89
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

These vessels are designed to operate in rivers such as the Tigris, or Don. They can be shipped by rail in sections. The propellers are in tunnels to avoid fouling.  Overall, they somewhat resemble the Confederate Casement Ironclads, but with only the middle third in the casement, allowing guns to be mounted fore and aft.

Draft is that of the OTL Insect Class, which operated in the Tigris River.

The forward 120mm is a conventional naval rifle.
The 118L20 is a howitzer. 
The twin 15mm guns are Gardner handcranked machine guns on the roof.
10mm gunshields are provided. 
A pair of 45mm QF are casement mounted amidships. This can fire fore/aft, or engage targets on the beam. While lacking the punch of the main guns, they allow suppressive fire totally under armor, and the small HE charge in the gun is sufficient to quickly engage and destroy enemy field peices.

The raised amidships superstructure is covered by 10mm armor and slanted back at 30 degrees (for a Cos30 O/H = 2.8m), this is  expected to defeat all small arms.
The main belt covers from +1.7 to -0.3m with 20mm armor, protecting the engines and magazines. This is expected to defeat any field gun HE rounds, as field guns will not be fitted with

Range is for 10 days.

Miscellaneous weights :
3t - Extra ventilation
0t - SR Radio 1919

Decks :
+4.2
+1.7  1st Deck
-1.2   Engineering deck.

1902 ref, 1919 refurb.

[Kaiser Kirk]

Dolphin, Parthian 3rd Class Cruiser laid down 1896
Refurbished 1922

Displacement:
   898 t light; 935 t standard; 1,026 t normal; 1,099 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (223.25 ft / 216.54 ft) x 36.09 ft x (9.84 / 10.35 ft)
   (68.05 m / 66.00 m) x 11.00 m  x (3.00 / 3.15 m)

Armament:
      4 - 3.54" / 90.0 mm 45.0 cal guns - 22.05lbs / 10.00kg shells, 200 per gun
     Quick firing guns in deck mounts, 1899 Model
     2 x Single mounts on centreline ends, evenly spread
     2 x Single mounts on sides, forward deck aft
      4 - 2.36" / 60.0 mm 50.0 cal guns - 7.05lbs / 3.20kg shells, 250 per gun
     Quick firing guns in deck mounts, 1899 Model
     4 x Single mounts on side ends, evenly spread
      8 - 0.59" / 15.0 mm 74.0 cal guns - 0.11lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1876 Model
     4 x Twin mounts on side ends, evenly spread
      4 raised mounts
      Weight of broadside 117 lbs / 53 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.97" / 50 mm   140.75 ft / 42.90 m   7.22 ft / 2.20 m
   Ends:   Unarmoured
     Main Belt covers 100 % of normal length

   - Hull Bulges:
      0.00" / 0 mm     0.00 ft / 0.00 m   0.00 ft / 0.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm         -               -
   2nd:   0.24" / 6 mm         -               -
   3rd:   0.39" / 10 mm         -               -

   - Armoured deck - single deck: 0.79" / 20 mm For and Aft decks

   - Conning towers: Forward 1.97" / 50 mm,  Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 1,212 ihp / 904 Kw = 14.00 kts
   Range 4,000nm at 8.00 kts
   Bunker at max displacement = 164 tons (100% coal)

Complement:
   89 - 117

Cost:
   £0.066 million / $0.264 million

Distribution of weights at normal displacement:
   Armament: 23 tons, 2.3 %
   Armour: 163 tons, 15.9 %
      - Belts: 87 tons, 8.4 %
      - Armament: 12 tons, 1.1 %
      - Armour Deck: 60 tons, 5.9 %
      - Conning Tower: 4 tons, 0.4 %
   Machinery: 202 tons, 19.7 %
   Hull, fittings & equipment: 377 tons, 36.7 %
   Fuel, ammunition & stores: 128 tons, 12.5 %
   Miscellaneous weights: 133 tons, 13.0 %
      - Hull below water: 20 tons
      - Hull void weights: 21 tons
      - Hull above water: 40 tons
      - On freeboard deck: 25 tons
      - Above deck: 27 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,195 lbs / 996 Kg = 98.7 x 3.5 " / 90 mm shells or 0.9 torpedoes
   Stability (Unstable if below 1.00): 1.33
   Metacentric height 1.8 ft / 0.5 m
   Roll period: 11.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.12
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.467 / 0.476
   Length to Beam Ratio: 6.00 : 1
   'Natural speed' for length: 14.72 kts
   Power going to wave formation at top speed: 43 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 12.00 degrees
   Stern overhang: 3.28 ft / 1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  16.17 ft / 4.93 m,  14.63 ft / 4.46 m
      - Forward deck:   30.00 %,  14.63 ft / 4.46 m,  13.12 ft / 4.00 m
      - Aft deck:   35.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
      - Quarter deck:   15.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
      - Average freeboard:      13.77 ft / 4.20 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 77.8 %
      - Above water (accommodation/working, high = better): 145.8 %
   Waterplane Area: 5,056 Square feet or 470 Square metres
   Displacement factor (Displacement / loading): 135 %
   Structure weight / hull surface area: 46 lbs/sq ft or 224 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.85
      - Longitudinal: 4.36
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Warning: Date too early for machine gun - 3rd battery

This is meant to be a simple 3rd rate cruiser to maintain a presence in the ports of the Indian Ocean.

Miscellaneous weights :
22t - (Void) Construction reserve
2t   - 1905 fire control
25t - Long range radio 1904 refit.
9t - Extra Ventilation
20t - 10t motor launch
40t - 20 Marines
20t - Brig

Decks :
+4.0  2nd Deck, Weather deck
+1.5 1st Deck, Armor Deck., Top of Main belt.
-0.7   Bottom of Main belt
-1. 0  1st Deck, pierced by engines
-2.8 Engineering deck.

1904 refit :+47t
+25t  Long range radio
-4x 90L40 BL, 4x45L40
+22t +4x 90L45 QF, 4x 60L50
-32t cons resv

1907 refit:2t
+2t 1905 fire control
-57t cons resv

1922
upgrade to 1918 FC

[Kaiser Kirk]

1914 Coastal Patrol Cutter CPC-1 "Mackerel"

1914     CPC-1
1914    CPC-2-7
1915           CPC-8-10


Mackrel, Parthian Coastal Patrol Cutter laid down 1914

Displacement:
   460 t light; 492 t standard; 562 t normal; 617 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (162.81 ft / 160.76 ft) x 23.79 ft x (8.76 / 9.46 ft)
   (49.63 m / 49.00 m) x 7.25 m  x (2.67 / 2.88 m)

Armament:
      2 - 4.72" / 120 mm 43.0 cal guns - 55.12lbs / 25.00kg shells, 200 per gun
     Quick firing guns in deck mounts, 1912 Model
     2 x Single mounts on centreline, forward evenly spread
      1 raised mount
      1 - 4.65" / 118 mm 40.0 cal gun - 44.09lbs / 20.00kg shells, 300 per gun
     Breech loading gun in deck mount, 1889 Model
     1 x Single mount on centreline, aft deck forward
      1 raised mount
      8 - 0.59" / 15.0 mm 74.0 cal guns - 0.24lbs / 0.11kg shells, 1,300 per gun
     Breech loading guns in deck mounts, 1899 Model
     4 x Twin mounts on side ends, evenly spread
      4 raised mounts
      Weight of broadside 156 lbs / 71 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.98" / 25 mm   101.80 ft / 31.03 m   3.28 ft / 1.00 m
   Ends:   Unarmoured
   Upper:   0.98" / 25 mm   101.80 ft / 31.03 m   6.89 ft / 2.10 m
     Main Belt covers 97 % of normal length

   - Hull void:
      0.00" / 0 mm     0.00 ft / 0.00 m   0.00 ft / 0.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.31" / 8 mm         -               -
   2nd:   0.31" / 8 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 0.59" / 15 mm

   - Conning towers: Forward 0.98" / 25 mm, Aft 0.00" / 0 mm

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 2,016 ihp / 1,504 Kw = 16.84 kts
   Range 4,400nm at 10.00 kts
   Bunker at max displacement = 125 tons (23% coal)

Complement:
   57 - 75

Cost:
   £0.051 million / $0.206 million

Distribution of weights at normal displacement:
   Armament: 24 tons, 4.3 %
      - Guns: 24 tons, 4.3 %
   Armour: 72 tons, 12.9 %
      - Belts: 44 tons, 7.9 %
      - Armament: 2 tons, 0.4 %
      - Armour Deck: 24 tons, 4.4 %
      - Conning Tower: 1 tons, 0.3 %
   Machinery: 123 tons, 21.9 %
   Hull, fittings & equipment: 142 tons, 25.3 %
   Fuel, ammunition & stores: 102 tons, 18.1 %
   Miscellaneous weights: 98 tons, 17.4 %
      - Hull void weights: 2 tons
      - Hull above water: 32 tons
      - On freeboard deck: 36 tons
      - Above deck: 28 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     626 lbs / 284 Kg = 11.9 x 4.7 " / 120 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.06
   Metacentric height 0.7 ft / 0.2 m
   Roll period: 12.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.66
   Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.587 / 0.597
   Length to Beam Ratio: 6.76 : 1
   'Natural speed' for length: 12.68 kts
   Power going to wave formation at top speed: 63 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   25.00 %,  11.65 ft / 3.55 m,  9.84 ft / 3.00 m
      - Forward deck:   31.00 %,  9.84 ft / 3.00 m,  8.37 ft / 2.55 m
      - Aft deck:   32.00 %,  8.37 ft / 2.55 m,  8.37 ft / 2.55 m
      - Quarter deck:   12.00 %,  8.37 ft / 2.55 m,  8.69 ft / 2.65 m
      - Average freeboard:      9.16 ft / 2.79 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 92.3 %
      - Above water (accommodation/working, high = better): 80.6 %
   Waterplane Area: 2,763 Square feet or 257 Square metres
   Displacement factor (Displacement / loading): 116 %
   Structure weight / hull surface area: 33 lbs/sq ft or 160 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.77
      - Longitudinal: 3.39
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Adequate machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

The Coastal Patrol vessel is equipped with
a pair of 120mm guns forward.
Aft, a 118mm HOW is mounted in X, well clear of the equipment on the aft deck.
Four old twin Gardner 15mm handcranked MGs provide dock security.

Armor :
0.5 to 2.6 : Upperbelt covers from weather deck down to waterline.
0.5 to -0.5 : main belt coverage

Misc Weight :
1t Void
0t - 100nm SR radio
3t - 1918 FC
25t - Hulesmeyer remote detection system.
10t - 5t Motor launch, fits 16men (4t)  + engine
1t - Enhanced ventilation
32t - 16 Marines (Section)
25t - Minesweeping gear on aft deck

Decks
+2.6 : Weather Deck
+0.1 : First Deck / Armor deck 15mm
-2.51 : Engineering

1922 Fleet FC refits
Updated to 1918 FC

[Kaiser Kirk]

Recalde, Iberian Cruiser-Gunboat laid down 1905,
purchased and refurbished 1917.

Displacement:
   1,106 t light; 1,164 t standard; 1,392 t normal; 1,575 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (257.68 ft / 255.91 ft) x 33.46 ft x (11.15 / 12.31 ft)
   (78.54 m / 78.00 m) x 10.20 m  x (3.40 / 3.75 m)

Armament:
      4 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 155 per gun
     Quick firing guns in deck mounts, 1913 Model
     2 x Single mounts on centreline ends, evenly spread
      1 raised mount aft - superfiring
     2 x Single mounts on sides, forward deck aft
      2 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 220 per gun
     Quick firing guns in deck mounts, 1912 Model
     2 x Single mounts on sides, forward deck aft
      2 double raised mounts
      Weight of broadside 331 lbs / 150 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.98" / 25 mm   255.91 ft / 78.00 m   6.56 ft / 2.00 m
     Main Belt covers 154 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.97" / 50 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 0.98" / 25 mm
   Forecastle: 0.98" / 25 mm  Quarter deck: 0.98" / 25 mm

   - Conning towers: Forward 2.95" / 75 mm, Aft 0.00" / 0 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 1 shaft, 4,290 shp / 3,200 Kw = 18.80 kts
   Range 5,000nm at 10.00 kts
   Bunker at max displacement = 411 tons (90% coal)

Complement:
   113 - 148

Cost:
   £0.106 million / $0.423 million

Distribution of weights at normal displacement:
   Armament: 64 tons, 4.6 %
      - Guns: 64 tons, 4.6 %
   Armour: 191 tons, 13.7 %
      - Belts: 61 tons, 4.4 %
      - Armament: 20 tons, 1.5 %
      - Armour Deck: 102 tons, 7.3 %
      - Conning Tower: 8 tons, 0.6 %
   Machinery: 354 tons, 25.4 %
   Hull, fittings & equipment: 411 tons, 29.6 %
   Fuel, ammunition & stores: 286 tons, 20.6 %
   Miscellaneous weights: 85 tons, 6.1 %
      - On freeboard deck: 54 tons
      - Above deck: 31 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,748 lbs / 793 Kg = 26.1 x 5.1 " / 130 mm shells or 0.7 torpedoes
   Stability (Unstable if below 1.00): 1.37
   Metacentric height 1.7 ft / 0.5 m
   Roll period: 10.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 65 %
         - Recoil effect (Restricted arc if above 1.00): 0.24
   Seaboat quality  (Average = 1.00): 1.30

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.510 / 0.523
   Length to Beam Ratio: 7.65 : 1
   'Natural speed' for length: 16.00 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 0.66 ft / 0.20 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  12.80 ft / 3.90 m,  12.14 ft / 3.70 m
      - Forward deck:   30.00 %,  12.14 ft / 3.70 m,  11.15 ft / 3.40 m
      - Aft deck:   35.00 %,  7.22 ft / 2.20 m,  7.22 ft / 2.20 m
      - Quarter deck:   15.00 %,  7.22 ft / 2.20 m,  7.22 ft / 2.20 m
      - Average freeboard:      9.58 ft / 2.92 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 95.8 %
      - Above water (accommodation/working, high = better): 86.6 %
   Waterplane Area: 5,545 Square feet or 515 Square metres
   Displacement factor (Displacement / loading): 121 %
   Structure weight / hull surface area: 52 lbs/sq ft or 253 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - Longitudinal: 1.79
      - Overall: 1.06
   Adequate machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Good seaboat, rides out heavy weather easily

   Miscellaneous weights: 85 tons, 6.1 %
      - On freeboard deck: 54 tons
      - Above deck: 31 tons

1917 Refurbished Armanent
A/1/2 are on deck, "X" is superimposed to allow clear arcs over mine rails.
1/2 are mounted Fore deck aft, above the 1.2m break in deck height, allowing fire aft over the torpedo tubes.

1917 Refurbished Misc Weight
AD---0.7t  Fire Control 1918
AD---25t   Long Range Wireless
AD--- 5t   Flotilla Leader Facilities
OD---18t  2T3 530mm Torpedoes, aft deck forward.
OD---36t  stern mine rails and 40 mines

Basic Refit 1922
Upgrade to 1918 FC

[Kaiser Kirk]

Sibari  "Mastiff" , Parthian Gunboat laid down 1925

1924.5   GB 7 Sibari
1925.5   GB 8 Sibari
1926.5   GB 9 Sibari
1927.5   GB 10 Sibari
1928.0   GB 11 Sibari

Displacement:
   3,000 t light; 3,248 t standard; 3,486 t normal; 3,677 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (355.82 ft / 351.05 ft) x 49.21 ft x (12.80 / 13.35 ft)
   (108.45 m / 107.00 m) x 15.00 m  x (3.90 / 4.07 m)

Armament:
      6 - 6.50" / 165 mm 43.0 cal guns - 143.30lbs / 65.00kg shells, 266 per gun
     Quick firing guns in deck and hoist mounts, 1925 Model
     3 x 2-gun mounts on centreline ends, majority forward
      1 raised mount - superfiring
      2 - 6.42" / 163 mm 20.0 cal guns - 154.32lbs / 70.00kg shells, 200 per gun
     Quick firing guns in deck and hoist mount, 1925 Model
     1 x 2-gun mount on centreline, aft deck centre
      1 raised mount
      8 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 500 per gun
     Anti-air guns in deck mounts, 1925 Model
     4 x 2-gun mounts on side ends, evenly spread
      8 - 0.59" / 15.0 mm 70.0 cal guns - 0.11lbs / 0.05kg shells, 5,000 per gun
     Breech loading guns in deck mounts, 1925 Model
     2 x 2 row quad mounts on centreline ends, evenly spread
      2 double raised mounts
      Weight of broadside 1,222 lbs / 554 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.94" / 100 mm   228.18 ft / 69.55 m   11.15 ft / 3.40 m
   Ends:   Unarmoured
     Main Belt covers 100 % of normal length

   - Hull void:
      0.00" / 0 mm     0.00 ft / 0.00 m   0.00 ft / 0.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   4.33" / 110 mm   1.38" / 35 mm      3.54" / 90 mm
   2nd:   1.38" / 35 mm   1.38" / 35 mm      1.38" / 35 mm
   3rd:   0.24" / 6 mm         -               -
   4th:   0.12" / 3 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 1.38" / 35 mm
   Forecastle: 1.38" / 35 mm  Quarter deck: 1.38" / 35 mm

   - Conning towers: Forward 3.94" / 100 mm, Aft 1.38" / 35 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Electric motors, 2 shafts, 15,840 shp / 11,816 Kw = 23.10 kts
   Range 4,930nm at 12.00 kts
   Bunker at max displacement = 428 tons (23% coal)

Complement:
   226 - 294

Cost:
   £0.866 million / $3.465 million

Distribution of weights at normal displacement:
   Armament: 245 tons, 7.0 %
      - Guns: 245 tons, 7.0 %
   Armour: 834 tons, 23.9 %
      - Belts: 428 tons, 12.3 %
      - Armament: 69 tons, 2.0 %
      - Armour Deck: 310 tons, 8.9 %
      - Conning Towers: 26 tons, 0.8 %
   Machinery: 525 tons, 15.1 %
   Hull, fittings & equipment: 1,004 tons, 28.8 %
   Fuel, ammunition & stores: 486 tons, 13.9 %
   Miscellaneous weights: 392 tons, 11.2 %
      - Hull below water: 183 tons
      - Hull void weights: 19 tons
      - Hull above water: 40 tons
      - On freeboard deck: 45 tons
      - Above deck: 105 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,729 lbs / 1,691 Kg = 27.2 x 6.5 " / 165 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 2.1 ft / 0.7 m
   Roll period: 14.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.68
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.552 / 0.558
   Length to Beam Ratio: 7.13 : 1
   'Natural speed' for length: 18.74 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 13.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  20.67 ft / 6.30 m,  18.21 ft / 5.55 m
      - Forward deck:   33.00 %,  18.21 ft / 5.55 m,  15.75 ft / 4.80 m
      - Aft deck:   32.00 %,  7.87 ft / 2.40 m,  7.87 ft / 2.40 m
      - Quarter deck:   15.00 %,  7.87 ft / 2.40 m,  7.87 ft / 2.40 m
      - Average freeboard:      13.14 ft / 4.01 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 82.5 %
      - Above water (accommodation/working, high = better): 127.2 %
   Waterplane Area: 12,079 Square feet or 1,122 Square metres
   Displacement factor (Displacement / loading): 113 %
   Structure weight / hull surface area: 67 lbs/sq ft or 326 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.70
      - Longitudinal: 1.36
      - Overall: 0.75
   Caution: Hull subject to strain in open-sea
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

Misc Wt
19 - Reserve

AD
25t -  FC
25t - Searchlight Tower Aft (Night Fighting)
25t - LR Radio
0t - SR Radio
10t - Dedicated Air/Spotting SR Radio
20t - Squadron / FireSupport Plot Room

OD
20t : Scout Floatplane
5t : Gunpowder Cat
5t  : MSW Paravanes

1t : ASW Paravanes
2t : 2 'y' DC throwers
12t : 48 x 280kg DC


HAW
3t : CO2 compressor A/C
5t : Extra Fire Fighting
32t : Marine Squad

HBW
15t :  Enhanced Hydrophone station
10t : Basic Sonar
18t : 2 UTT 21" Bow, 6 torps
132t : Turboelectric Drive
10t : Batteries

Decks :
4.8m : Weather Deck
2.4m : Armor Deck - top of main belt
-0.1m :  1st deck
           -1.0 m : bottom main belt
-3.4m : Engineering deck
-3.9 m : Keel

Designed to eventually replace the Dolphin and Recalde classes as a gunboat and patrol vessel, able to act as a fleet auxiliary if needed.

As a gunboat, it can operate in fairly shallow water, and act as a patrol vessel.  The 165mm rifles will offer heavy and rapid direct support fire, while the twin 163mm howitzers allow engagement of targets screened from direct fire.
The 57 and 15mm offer less explosive anti-personnel options.

If pressed into fleet service,
As a Close Escort it would serve as an intermediate screen against MTBs and DDs, while also being equipped to detect and prosecute ASW attacks.

Against attacking destroyers, the powerful 165mm battery is expected to wreck havok. While the light armor is expected to preserve the firepower and floatation of the vessel.

Any offensive role would be at night, possibly as a follow up to an earlier attack. The Hulesmeyer device has not proved an effective early warning system, but is viewed as promising for night time formation steaming.

            1                   3               
A (B) [a]                     [ b ] (X)   Y
            2                   4

X= 163mm HOW

The armor is meant to defeat QF weapons as might be found on destroyers or smaller cruisers.  To allow substantial engine room, an armor deck is used, at the 2.3m level, leaving only 1 deck level unarmored.

A reversion to underwater torpedo tubes sees 2 fitted in the bow, using submarine technology. These are forward of the main bulkhead, and are protected by the forward armored deck.

[Kaiser Kirk]

MGB, Pathian Motor Gun Boat, laid down 1926

1926.0   MGB 1-5
1926.5   MGB 6-10
1927.0   MGB 11-15
1927.5   MGB 16-20
1928.0   MGB 21-23

Displacement:
   60 t light; 73 t standard; 74 t normal; 75 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (64.34 ft / 62.34 ft) x 15.58 ft x (4.10 / 4.16 ft)
   (19.61 m / 19.00 m) x 4.75 m  x (1.25 / 1.27 m)

Armament:
      1 - 3.54" / 90.0 mm 50.0 cal gun - 24.25lbs / 11.00kg shells, 190 per gun
     Quick firing gun in deck mount, 1926 Model
     1 x Single mount on centreline, forward deck centre
      1 - 4.65" / 118 mm 21.0 cal gun - 55.12lbs / 25.00kg shells, 190 per gun
     Quick firing gun in deck mount, 1926 Model
     1 x Single mount on centreline, aft deck centre
      8 - 0.59" / 15.0 mm 70.0 cal guns - 0.12lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1926 Model
     2 x Twin mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
     2 x Twin mounts on sides amidships
      Weight of broadside 80 lbs / 36 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.59" / 15 mm     40.52 ft / 12.35 m   9.19 ft / 2.80 m
   Ends:   Unarmoured
     Main Belt covers 100 % of normal length

   - Hull void:
      0.00" / 0 mm     0.00 ft / 0.00 m   0.00 ft / 0.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm   0.31" / 8 mm            -
   2nd:   0.59" / 15 mm   0.31" / 8 mm            -
   3rd:   0.31" / 8 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 0.39" / 10 mm
   Forecastle: 0.31" / 8 mm  Quarter deck: 0.39" / 10 mm

   - Conning towers: Forward 0.59" / 15 mm, Aft 0.00" / 0 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Electric motors, 2 shafts, 118 shp / 88 Kw = 10.00 kts
   Range 400nm at 8.00 kts
   Bunker at max displacement = 3 tons (90% coal)

Complement:
   12 - 16

Cost:
   £0.018 million / $0.073 million

Distribution of weights at normal displacement:
   Armament: 9 tons, 12.3 %
      - Guns: 9 tons, 12.3 %
   Armour: 22 tons, 30.3 %
      - Belts: 11 tons, 14.3 %
      - Armament: 6 tons, 8.5 %
      - Armour Deck: 5 tons, 7.3 %
      - Conning Tower: 0 tons, 0.3 %
   Machinery: 4 tons, 5.5 %
   Hull, fittings & equipment: 21 tons, 29.0 %
   Fuel, ammunition & stores: 14 tons, 18.8 %
   Miscellaneous weights: 3 tons, 4.1 %
      - Hull below water: 1 tons
      - Hull void weights: 1 tons
      - Hull above water: 0 tons
      - Above deck: 1 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     171 lbs / 78 Kg = 7.7 x 3.5 " / 90 mm shells or 0.4 torpedoes
   Stability (Unstable if below 1.00): 1.61
   Metacentric height 0.7 ft / 0.2 m
   Roll period: 7.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 38 %
         - Recoil effect (Restricted arc if above 1.00): 0.75
   Seaboat quality  (Average = 1.00): 1.52

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.650 / 0.652
   Length to Beam Ratio: 4.00 : 1
   'Natural speed' for length: 7.90 kts
   Power going to wave formation at top speed: 67 %
   Trim (Max stability = 0, Max steadiness = 100): 19
   Bow angle (Positive = bow angles forward): 13.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  8.69 ft / 2.65 m,  7.55 ft / 2.30 m
      - Forward deck:   30.00 %,  7.55 ft / 2.30 m,  7.55 ft / 2.30 m
      - Aft deck:   35.00 %,  7.55 ft / 2.30 m,  7.55 ft / 2.30 m
      - Quarter deck:   15.00 %,  7.55 ft / 2.30 m,  7.55 ft / 2.30 m
      - Average freeboard:      7.64 ft / 2.33 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 65.4 %
      - Above water (accommodation/working, high = better): 89.1 %
   Waterplane Area: 744 Square feet or 69 Square metres
   Displacement factor (Displacement / loading): 127 %
   Structure weight / hull surface area: 19 lbs/sq ft or 94 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.53
      - Longitudinal: 17.82
      - Overall: 0.75
   Caution: Hull subject to strain in open-sea
   Excellent machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather


Intended as a Coastal/ Riverine gunboat
as an successor to the 'Dragonfly' style casement vessel,
and affordable in large numbers, while being small
enough to be transportable as deck cargo.
In many areas the vessel can be transported by
rail on flatcars as well, though the 4m width is wider
than the flatcars normally transport, despite
the Parthian 1.8m wide gauge railways.
This means throughcuts, tunnels and signals can be issues

The advantage of the casement is all ammunition handling
can occur under armor, but above water, allowing
the draft to be very shallow.

For this version, the goal is to dispense with the
armored casement.

The desire is fore/aft gun basal ring gun mounts, where
shells can be safely fed from below decks via stairs
and crews handing shells up.
This also requires keeping shell weights down.

TDS defaults as 1.2m high,
which I take to mean Engineering is at that level,
while Keel is 1.26 - a very flat bottom.

For a 2.5m (8ft) deck height, that puts +1.3 as the minimum height,
but I like engineering to be at least 3.5m
so 2.3 is the Main deck.

Length is constrained to allow 2 to be constructed in a 50ft dock at once.

Armor :
Main belt is +2.3 to - 0.50

The Fore / Quarter deck are protective decks
while the citadel has the armor deck capping the belt.

Engineering :
8knots cruise ensures that even fast river currents can be easily over come.
This only takes 35shp.
10 knots is 88shp, or 250%.

Oil sprayed coal is relied on, as wood can be used in a pinch.

To allow maximum manuevers with differential propellors,
turbogenerators are fitted.

Reserve : 1t

AD
0.9t - FC
0t - SR Radio

OD

HAW
0.1t - CO2 Compressor AC

HBW
1t - Turbogenerator

[Kaiser Kirk]

Gunboat G "Hukar" - Porcupine, Parthian Coastal Gunboat laid down 1930

Displacement:
   1,700 t light; 1,839 t standard; 1,941 t normal; 2,023 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (260.65 ft / 255.91 ft) x 47.57 ft x (9.84 / 10.17 ft)
   (79.45 m / 78.00 m) x 14.50 m  x (3.00 / 3.10 m)

Armament:
      3 - 6.50" / 165 mm 43.0 cal guns - 143.30lbs / 65.00kg shells, 275 per gun
     Dual purpose guns in deck and hoist mounts, 1912 Model
     3 x Single mounts on centreline ends, majority aft
      1 raised mount aft - superfiring
      1 - 6.42" / 163 mm 21.0 cal gun - 118.76lbs / 53.87kg shells, 250 per gun
     Quick firing gun in deck and hoist mount, 1930 Model
     1 x Single mount on centreline, forward deck centre
      1 raised mount
      8 - 1.46" / 37.0 mm 70.0 cal guns - 1.72lbs / 0.78kg shells, 1,400 per gun
     Anti-air guns in deck mounts, 1929 Model
     2 x 4-gun mounts on sides amidships
      8 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 4,000 per gun
     Machine guns in deck mounts, 1929 Model
     4 x Twin mounts on side ends, evenly spread
      4 double raised mounts
      Weight of broadside 566 lbs / 257 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.95" / 75 mm   119.75 ft / 36.50 m   9.68 ft / 2.95 m
   Ends:   Unarmoured
     Main Belt covers 72 % of normal length
     Main Belt inclined -10.00 degrees (positive = in)

   - Hull void:
      0.00" / 0 mm     0.00 ft / 0.00 m   0.00 ft / 0.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.95" / 75 mm   1.57" / 40 mm      1.57" / 40 mm
   2nd:   2.95" / 75 mm   1.57" / 40 mm      1.57" / 40 mm
   3rd:   0.31" / 8 mm         -               -
   4th:   0.31" / 8 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 1.57" / 40 mm
   Forecastle: 1.57" / 40 mm  Quarter deck: 1.57" / 40 mm

   - Conning towers: Forward 3.94" / 100 mm, Aft 0.00" / 0 mm

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 2 shafts, 4,869 shp / 3,633 Kw = 18.00 kts
   Range 3,120nm at 12.00 kts
   Bunker at max displacement = 184 tons

Complement:
   146 - 190

Cost:
   £0.517 million / $2.069 million

Distribution of weights at normal displacement:
   Armament: 130 tons, 6.7 %
      - Guns: 130 tons, 6.7 %
   Armour: 494 tons, 25.5 %
      - Belts: 168 tons, 8.7 %
      - Armament: 60 tons, 3.1 %
      - Armour Deck: 253 tons, 13.0 %
      - Conning Tower: 13 tons, 0.7 %
   Machinery: 148 tons, 7.6 %
   Hull, fittings & equipment: 592 tons, 30.5 %
   Fuel, ammunition & stores: 242 tons, 12.4 %
   Miscellaneous weights: 336 tons, 17.3 %
      - Hull below water: 140 tons
      - Hull void weights: 20 tons
      - Hull above water: 68 tons
      - On freeboard deck: 25 tons
      - Above deck: 83 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,718 lbs / 1,687 Kg = 27.1 x 6.5 " / 165 mm shells or 1.5 torpedoes
   Stability (Unstable if below 1.00): 1.35
   Metacentric height 2.8 ft / 0.9 m
   Roll period: 11.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.37
   Seaboat quality  (Average = 1.00): 1.41

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.567 / 0.572
   Length to Beam Ratio: 5.38 : 1
   'Natural speed' for length: 16.00 kts
   Power going to wave formation at top speed: 56 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   25.00 %,  17.72 ft / 5.40 m,  15.26 ft / 4.65 m
      - Forward deck:   25.00 %,  15.26 ft / 4.65 m,  12.80 ft / 3.90 m
      - Aft deck:   25.00 %,  12.80 ft / 3.90 m,  12.80 ft / 3.90 m
      - Quarter deck:   25.00 %,  12.80 ft / 3.90 m,  13.78 ft / 4.20 m
      - Average freeboard:      14.09 ft / 4.29 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 61.5 %
      - Above water (accommodation/working, high = better): 151.0 %
   Waterplane Area: 8,633 Square feet or 802 Square metres
   Displacement factor (Displacement / loading): 126 %
   Structure weight / hull surface area: 56 lbs/sq ft or 271 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.66
      - Longitudinal: 2.33
      - Overall: 0.75
   Caution: Hull subject to strain in open-sea
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Guns :
165mm are primary direct fire weapon, able to engage aircraft. .
They are primitive DP guns in the 1929 mounting, 

163mm HOW are bombardment or ASW

37mm are primary AA sited for 6 Fore/aft/beam

Paired GAST 23mm are anti-strafing.

Borrowed from submarines are 4 bow tubes
firing 21" torpedoes


Armor :
Armored Deck at 1.4m caps Belt
Belt extends from 1.4m to -1.5m
Bow and Stern are protective decks.

Belt is sloped outwards at 10 degrees
2.9/cos(10) = 2.9447 = 2.95

TDS :
The ship has no TDS,
relying on it's small size, high manueverability via electric drive, and really shallow draft.
...really shallow.
The Standard torpedo settings of 11ft will go under the ship. Shallower torpedo settings risk breaching a wave trough in even light seas.



Engines:
Diesel electric will allow full speed forward and reverse, making a more difficult target....but also allowing navigation up streams far easier.

148 x 0.3 = 44.4= 44
148 x 0.25 = 37 = 37

Range : +50% = 4950 , enough to go between two bases, and return if the base is gone.

Reserve : 20t

AD :
13t FC
25t NF - Aft Con searchlight tower, etc.
0t SR Radio
10t SR Radio for Spotting
25t Hulesmeyer
10t Squadron Plot Room

OD
5t paravanes
2t "Y" DC throwers
8t   DC : 24 x 280kg
10t - Mine rail + 10mines


HAW
4t -    CO2 Compressor AC
64t-   Marines

HBW

24t - 4 bow torpedo tubes,  4 torpedoes 21" x 3t
15t - Enhanced Hydrophone
10t - Sonar
37t - Turbogenerators
44t - Diesel Engines
10t - Batteries

Decks
3.9  Weather Deck
1.4  Main Armored Deck
-1.2 Deck/Engineering spaces
           -1.5  Bottom Armored Belt
-2.3 Engineering
-2.86 Bilges, Double bottom

[Kaiser Kirk]

Sturgeon, Parthian Coastal Patrol Cutter laid down 1930

This Coastal Patrol vessel named for an armored fish.

An updated version of the Mackerel Class, intended to provide
a light gunboat for littoral and riverine patrol. 

Displacement:
   460 t light; 515 t standard; 562 t normal; 599 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (162.84 ft / 160.76 ft) x 26.25 ft x (8.73 / 9.18 ft)
   (49.63 m / 49.00 m) x 8.00 m  x (2.66 / 2.80 m)

Armament:
      4 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 500 per gun
     Dual purpose guns in deck mounts, 1930 Model
     2 x 2-gun mounts on centreline, forward evenly spread
      1 raised mount
      1 - 4.65" / 118 mm 21.0 cal gun - 59.52lbs / 27.00kg shells, 300 per gun
     Breech loading gun in deck mount, 1930 Model
     1 x Single mount on centreline, aft deck forward
      1 raised mount
      8 - 0.91" / 23.0 mm 90.0 cal guns - 0.44lbs / 0.20kg shells, 3,400 per gun
     Machine guns in deck mounts, 1930 Model
     4 x Twin mounts on side ends, evenly spread
      4 raised mounts
      Weight of broadside 160 lbs / 73 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.98" / 25 mm   104.49 ft / 31.85 m   12.24 ft / 3.73 m
   Ends:   0.98" / 25 mm     56.23 ft / 17.14 m   12.40 ft / 3.78 m
     Main Belt covers 100 % of normal length

   - Hull void:
      0.00" / 0 mm     0.00 ft / 0.00 m   0.00 ft / 0.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm         -               -
   2nd:   0.59" / 15 mm         -               -
   3rd:   0.59" / 15 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 0.59" / 15 mm
   Forecastle: 0.59" / 15 mm  Quarter deck: 0.59" / 15 mm

   - Conning towers: Forward 0.98" / 25 mm, Aft 0.00" / 0 mm

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 2 shafts, 1,615 shp / 1,204 Kw = 16.00 kts
   Range 3,000nm at 12.00 kts
   Bunker at max displacement = 84 tons

Complement:
   57 - 75

Cost:
   £0.127 million / $0.507 million

Distribution of weights at normal displacement:
   Armament: 27 tons, 4.9 %
      - Guns: 27 tons, 4.9 %
   Armour: 121 tons, 21.5 %
      - Belts: 80 tons, 14.3 %
      - Armament: 7 tons, 1.3 %
      - Armour Deck: 32 tons, 5.7 %
      - Conning Tower: 1 tons, 0.3 %
   Machinery: 49 tons, 8.7 %
   Hull, fittings & equipment: 121 tons, 21.6 %
   Fuel, ammunition & stores: 101 tons, 18.1 %
   Miscellaneous weights: 142 tons, 25.3 %
      - Hull below water: 40 tons
      - Hull void weights: 3 tons
      - Hull above water: 33 tons
      - On freeboard deck: 35 tons
      - Above deck: 31 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     833 lbs / 378 Kg = 37.5 x 3.5 " / 90 mm shells or 0.8 torpedoes
   Stability (Unstable if below 1.00): 1.14
   Metacentric height 0.9 ft / 0.3 m
   Roll period: 11.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.46
   Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.534 / 0.542
   Length to Beam Ratio: 6.13 : 1
   'Natural speed' for length: 12.68 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 57
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  11.81 ft / 3.60 m,  10.17 ft / 3.10 m
      - Forward deck:   32.50 %,  10.17 ft / 3.10 m,  8.53 ft / 2.60 m
      - Aft deck:   32.50 %,  8.53 ft / 2.60 m,  8.53 ft / 2.60 m
      - Quarter deck:   15.00 %,  8.53 ft / 2.60 m,  8.53 ft / 2.60 m
      - Average freeboard:      9.26 ft / 2.82 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 62.6 %
      - Above water (accommodation/working, high = better): 86.7 %
   Waterplane Area: 2,901 Square feet or 270 Square metres
   Displacement factor (Displacement / loading): 130 %
   Structure weight / hull surface area: 29 lbs/sq ft or 143 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.66
      - Longitudinal: 2.43
      - Overall: 0.75
   Caution: Hull subject to strain in open-sea
   Excellent machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily



The armament  is adequate for stopping merchants, landing boarding parties, or - using the batteries- silently gliding into harbors to lan the marines to enforce laws. 

The fully armored hull and armament make it effective against insurgencies and for amphibious landings.

Like many Parthian gunboats, it has a mixture of direct fire weapons and a howitzer, supplemented by rapid fire cannon, allowing it to support the landing parties effectively.

The vessel is large enough and capable of ocean transit, but with the 11shallow draft and low seaboard would be unpleasent in bad seas.


Armor :
The hull is fully armored from the weather deck down to -1m below WL
The belt heights are averaged to account for the bow flare.

The main armored deck is at the weather deck level, capping the belt.


Misc Wt
3t Void

AD
3t- 1918 FC
3t- NF gear
0t - SR Radio
25t - Hulesmeyer remote detection system

OD
10t - 5t Motor Launch, fits 16men (4t) + engine
25t - Minesweeeping gear on aft deck

HAW
1t -  Enhanced ventilation (2x CO2 Compressor AC)
32t - 16 Marines (Section)

HBW
20t - Diesel
16t- Turbogenerator
4t - Electric Battery

Decks
+2.6 : Weather Deck, Armor Deck
+0.1 : Main deck
-1.0 : Bottom main belt
-2.51 : Engineering.