Rastreadores des Minas y Colocadores des Minas

[The Rock Doctor]

Ships primarily intended for the laying or sweeping of mines.  Ships with a secondary mine-laying capability, such as the Galapagos class cruisers, will be found in other threads.

Orinoco Class - 2 units

Rio Negro Class - 12 units

Galeras Class - 3 units

Rio Marouini Class - 4 units

Rio Elqui Class - 2 units

[The Rock Doctor]

Orinoco Class Minesweeper



The early success of mine warfare in the Pacific War has caught the attention of the Armada.  The mining of a DKB battleship in particular has alarmed many senior officers, who are not keen to see something similar happen to the Armada in a future war. 

In a scramble to introduce a minimal minesweeping capability - for training and development purposes, if nothing else - the Armada chose to make basic modifications to two El Banco class patrol craft scheduled for construction in 1908.  Cheap, small, and expendable, they seem like ideal choices for minesweeping work.  The two 47mm guns and marine constable accommodations have been replaced by two winches and a single crane capable of deploying sweeping booms and primitive paravanes.

Other modifications include splinter-proofing of the bridge area, an increase in bunkerage, and reduction in size of the powerplant.  The loss of three knots speed does not significantly impair the performance of the minesweeping mission, while allowing for much improved internal subdivision.  This will come in handy when mines start detonating in proximity to the hull.

Orinoco, MS-01, laid down 1908
Amazon, MS-01, laid down 1908

Orinoco, laid down 1908 (Engine 1906)

Displacement:
   354 t light; 363 t standard; 420 t normal; 465 t full load

Dimensions: Length overall / water x beam x draught
   168.93 ft / 164.04 ft x 24.28 ft x 8.20 ft (normal load)
   51.49 m / 50.00 m x 7.40 m  x 2.50 m

Armament:
      1 - 2.56" / 65.0 mm guns in single mounts, 8.38lbs / 3.80kg shells, 1907 Model
     Breech loading gun in deck mount
     on centreline forward, 1 raised gun
      2 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1907 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 8 lbs / 4 kg
   Shells per gun, main battery: 200

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm         -               -
   3rd:   0.39" / 10 mm         -               -

   - Conning tower: 0.98" / 25 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 500 ihp / 373 Kw = 12.61 kts
   Range 3,000nm at 10.00 kts (Bunkerage = 102 tons)

Complement:
   46 - 60

Cost:
   £0.023 million / $0.093 million

Distribution of weights at normal displacement:
   Armament: 1 tons, 0.3 %
   Armour: 2 tons, 0.6 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1 tons, 0.3 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 1 tons, 0.3 %
   Machinery: 71 tons, 17.0 %
   Hull, fittings & equipment: 212 tons, 50.5 %
   Fuel, ammunition & stores: 66 tons, 15.7 %
   Miscellaneous weights: 67 tons, 16.0 %
                -5 t:  Wireless
                -50 t:  Minesweeping kit
                -12 t:  Weight reserve

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     856 lbs / 388 Kg = 102.2 x 2.6 " / 65 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 0.7 ft / 0.2 m
   Roll period: 12.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.03
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has raised forecastle
   Block coefficient: 0.450
   Length to Beam Ratio: 6.76 : 1
   'Natural speed' for length: 12.81 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 25
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 3.28 ft / 1.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      18.37 ft / 5.60 m
      - Forecastle (20 %):   18.37 ft / 5.60 m (11.15 ft / 3.40 m aft of break)
      - Mid (50 %):      11.15 ft / 3.40 m
      - Quarterdeck (15 %):   11.15 ft / 3.40 m
      - Stern:      11.15 ft / 3.40 m
      - Average freeboard:   12.60 ft / 3.84 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 75.4 %
      - Above water (accommodation/working, high = better): 117.3 %
   Waterplane Area: 2,540 Square feet or 236 Square metres
   Displacement factor (Displacement / loading): 190 %
   Structure weight / hull surface area: 36 lbs/sq ft or 178 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 12.30
      - Overall: 1.26
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is adequate
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[The Rock Doctor]

Rio Negro Class

The Rio Negro class is an enlarged version of the Orinoco class minesweeper, which itself is a modification of the El Banco class patrol sloop.  In order to render the class more flexible, they are intended to fulfill both the minesweeping and coastal patrol functions.

Rio Negro, AM-03, laid down 1909
Rio Caqueta, AM-04, laid down 1909
Rio Cinaruca, AM-05, laid down 1909
Rio Domini, AM-06, laid down 1909
Rio Uapues, AM-07, laid down 1909
Rio Solinoes, AM-08, laid down 1909
Rio Zaza, AM-09, laid down 1910
Rio Demerara, AM-10, laid down 1910
Rio Caroni, AM-11, laid down 1910
Rio Paragua, AM-12, laid down 1910
Rio Apaporis, AM-13, laid down 1910
Rio Magdalena, AM-14, laid down 1910



Rio Negro, laid down 1909

Displacement:
   386 t light; 397 t standard; 454 t normal; 500 t full load

Dimensions: Length overall / water x beam x draught
   168.93 ft / 164.04 ft x 26.25 ft x 8.20 ft (normal load)
   51.49 m / 50.00 m x 8.00 m  x 2.50 m

Armament:
      1 - 2.56" / 65.0 mm guns in single mounts, 8.38lbs / 3.80kg shells, 1909 Model
     Breech loading gun in deck mount
     on centreline forward
      2 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1909 Model
     Quick firing guns in deck mounts
     on side, all amidships
      2 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1909 Model
     Machine guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
   Weight of broadside 15 lbs / 7 kg
   Shells per gun, main battery: 200

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm         -               -
   2nd:   0.98" / 25 mm         -               -
   3rd:   0.98" / 25 mm         -               -

   - Conning tower: 0.98" / 25 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 1,100 ihp / 821 Kw = 15.24 kts
   Range 3,000nm at 10.00 kts (Bunkerage = 103 tons)

Complement:
   48 - 63

Cost:
   £0.027 million / $0.108 million

Distribution of weights at normal displacement:
   Armament: 2 tons, 0.4 %
   Armour: 4 tons, 0.9 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 3 tons, 0.7 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 1 tons, 0.3 %
   Machinery: 85 tons, 18.6 %
   Hull, fittings & equipment: 195 tons, 43.0 %
   Fuel, ammunition & stores: 68 tons, 15.0 %
   Miscellaneous weights: 100 tons, 22.0 %
-50 t:  Minesweeping kit
-24 t:  Accommodation for 12 marine constables
-10 t:  Wireless
-16 t:  Weight reserve

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     873 lbs / 396 Kg = 104.2 x 2.6 " / 65 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 0.8 ft / 0.3 m
   Roll period: 12.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.04
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.450
   Length to Beam Ratio: 6.25 : 1
   'Natural speed' for length: 12.81 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 25
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 3.28 ft / 1.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      18.37 ft / 5.60 m
      - Forecastle (20 %):   18.37 ft / 5.60 m
      - Mid (35 %):      18.37 ft / 5.60 m (11.15 ft / 3.40 m aft of break)
      - Quarterdeck (15 %):   11.15 ft / 3.40 m
      - Stern:      11.15 ft / 3.40 m
      - Average freeboard:   13.68 ft / 4.17 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 88.3 %
      - Above water (accommodation/working, high = better): 139.7 %
   Waterplane Area: 2,746 Square feet or 255 Square metres
   Displacement factor (Displacement / loading): 158 %
   Structure weight / hull surface area: 31 lbs/sq ft or 153 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.76
      - Longitudinal: 11.89
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[The Rock Doctor]

Galeras Class

The Galeras class minelayers are built to the newest torpedo-boat standards.  In time of war, they are intended to lay offensive minefields in enemy waters proximal to Gran Colombia.  Seventy mines are carried aft on dual rails aft, essentially precluding embarkment of torpedoes and requiring that the aft guns be superfiring to avoid unpleasant consequences related to blast effects and nearby mines.

Three units are envisaged for 1912, likely to be dispersed between the two fleets rather than operated as a squadron. 

Note that the forward gun is not superfiring, as the sim states; it was just easier than splitting the 3" battery into two separate entries.  It has no significant effect on the design that I can find.

Galeras, TM-01, laid down 1912
Azufral, TM-02, laid down 1912
Romeral, TM-03, laid down 1912



Enter ship name, Enter country Enter ship type laid down 1909 (Engine 1912)

Displacement:
   996 t light; 1,026 t standard; 1,176 t normal; 1,296 t full load

Dimensions: Length overall / water x beam x draught
   332.30 ft / 328.08 ft x 30.84 ft x 10.17 ft (normal load)
   101.29 m / 100.00 m x 9.40 m  x 3.10 m

Armament:
      3 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1909 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, majority aft, all raised mounts - superfiring
      1 - 2.56" / 65.0 mm guns in single mounts, 8.38lbs / 3.80kg shells, 1909 Model
     Breech loading anti-airship gun in deck mount
     on centreline aft, 1 raised gun
      2 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1909 Model
     Breech loading guns in deck mounts
     on side, evenly spread
   Weight of broadside 49 lbs / 22 kg
   Shells per gun, main battery: 250

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm         -         0.98" / 25 mm
   2nd:   0.98" / 25 mm         -               -
   3rd:   0.39" / 10 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 24,000 shp / 17,904 Kw = 30.98 kts
   Range 6,800nm at 10.00 kts (Bunkerage = 269 tons) (~10 hrs @ flank speed)

Complement:
   99 - 130

Cost:
   £0.128 million / $0.511 million

Distribution of weights at normal displacement:
   Armament: 6 tons, 0.5 %
   Armour: 6 tons, 0.5 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 6 tons, 0.5 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 626 tons, 53.2 %
   Hull, fittings & equipment: 278 tons, 23.7 %
   Fuel, ammunition & stores: 180 tons, 15.3 %
   Miscellaneous weights: 79 tons, 6.7 %
-70 t:  Rails for seventy mines
-5 t:  Short-range wireless
-4 t:  Weight reserve


Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     256 lbs / 116 Kg = 19.0 x 3.0 " / 76 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.20
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 11.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.12
   Seaboat quality  (Average = 1.00): 0.84

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.400
   Length to Beam Ratio: 10.64 : 1
   'Natural speed' for length: 18.11 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 83
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      15.75 ft / 4.80 m
      - Forecastle (20 %):   15.75 ft / 4.80 m
      - Mid (40 %):      15.75 ft / 4.80 m (7.87 ft / 2.40 m aft of break)
      - Quarterdeck (15 %):   7.87 ft / 2.40 m
      - Stern:      7.87 ft / 2.40 m
      - Average freeboard:   11.02 ft / 3.36 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 183.4 %
      - Above water (accommodation/working, high = better): 123.4 %
   Waterplane Area: 6,228 Square feet or 579 Square metres
   Displacement factor (Displacement / loading): 57 %
   Structure weight / hull surface area: 26 lbs/sq ft or 128 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 0.86
      - Overall: 0.52
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

[The Rock Doctor]

Rio Marouini Class

An updated Rio Negro design, with newer (though still not first-rate) VTE engines and additional bunkerage.

AM-15, Rio Marouini, laid down 1915
AM-16, Rio Berbice, laid down 1915
AM-17, Rio Rupununi, laid down 1916
AM-18, Rio Cuyuni, laid down 1916

Enter ship name, Enter country Enter ship type laid down 1909 (Engine 1912)

Displacement:
   374 t light; 385 t standard; 454 t normal; 509 t full load

Dimensions: Length overall / water x beam x draught
   168.93 ft / 164.04 ft x 26.25 ft x 8.20 ft (normal load)
   51.49 m / 50.00 m x 8.00 m  x 2.50 m

Armament:
      1 - 2.56" / 65.0 mm guns in single mounts, 8.38lbs / 3.80kg shells, 1909 Model
     Breech loading gun in deck mount
     on centreline forward
      2 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1909 Model
     Quick firing guns in deck mounts
     on side, all amidships
      2 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1909 Model
     Machine guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
   Weight of broadside 15 lbs / 7 kg
   Shells per gun, main battery: 250

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm         -               -
   2nd:   0.98" / 25 mm         -               -
   3rd:   0.98" / 25 mm         -               -

   - Conning tower: 0.98" / 25 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 1,100 ihp / 821 Kw = 15.24 kts
   Range 3,800nm at 10.00 kts (Bunkerage = 124 tons)

Complement:
   48 - 63

Cost:
   £0.025 million / $0.099 million

Distribution of weights at normal displacement:
   Armament: 2 tons, 0.4 %
   Armour: 4 tons, 0.9 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 3 tons, 0.7 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 1 tons, 0.3 %
   Machinery: 73 tons, 16.0 %
   Hull, fittings & equipment: 195 tons, 42.9 %
   Fuel, ammunition & stores: 80 tons, 17.7 %
   Miscellaneous weights: 100 tons, 22.0 %
-50 t:  Minesweeping kit
-26 t:  Weight reserve
-24 t:  Accommodation for 12 marine constables

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     963 lbs / 437 Kg = 114.9 x 2.6 " / 65 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 0.8 ft / 0.3 m
   Roll period: 12.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.04
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.450
   Length to Beam Ratio: 6.25 : 1
   'Natural speed' for length: 12.81 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 25
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 3.28 ft / 1.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      18.37 ft / 5.60 m
      - Forecastle (20 %):   18.37 ft / 5.60 m
      - Mid (35 %):      18.37 ft / 5.60 m (11.15 ft / 3.40 m aft of break)
      - Quarterdeck (15 %):   11.15 ft / 3.40 m
      - Stern:      11.15 ft / 3.40 m
      - Average freeboard:   13.68 ft / 4.17 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 80.1 %
      - Above water (accommodation/working, high = better): 139.7 %
   Waterplane Area: 2,746 Square feet or 255 Square metres
   Displacement factor (Displacement / loading): 172 %
   Structure weight / hull surface area: 31 lbs/sq ft or 152 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.76
      - Longitudinal: 11.86
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[The Rock Doctor]

Rio Elqui Class Minesweeper

A new class of minesweeper with the legs to cross oceans at cruising speed.  She has modest defensive capabilities and could be used as a coastal escort instead.

The hull strength is high, reflecting a need for a reasonably large hull for the range, but with minimal fancy fittings due to the expendability factor.  If nothing else, the hull strength improve the chance of surviving nearby detonations.

AM-19, Rio Elqui, laid down 1919
AM-20, Rio Choapa, laid down 1919

Enter ship name, Enter country Enter ship type laid down 1916

Displacement:
   643 t light; 663 t standard; 817 t normal; 940 t full load

Dimensions: Length overall / water x beam x draught
   200.03 ft / 196.85 ft x 29.53 ft x 9.84 ft (normal load)
   60.97 m / 60.00 m x 9.00 m  x 3.00 m

Armament:
     1 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1916 Model
     Breech loading gun in deck mount
     on centreline forward, 1 raised gun
     1 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs / 0.70kg shells, 1916 Model
     Anti-aircraft gun in deck mount
     on centreline aft, 1 raised gun
     2 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1916 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 32 lbs / 15 kg
   Shells per gun, main battery: 200

Armour:
  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm   0.98" / 25 mm            -
   2nd:   0.98" / 25 mm         -               -
   3rd:   0.39" / 10 mm         -               -

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 1,400 ihp / 1,044 Kw = 15.58 kts
   Range 7,000nm at 10.00 kts (Bunkerage = 277 tons)

Complement:
   76 - 99

Cost:
   £0.063 million / $0.253 million

Distribution of weights at normal displacement:
   Armament: 4 tons, 0.5 %
   Armour: 3 tons, 0.4 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 3 tons, 0.4 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 92 tons, 11.2 %
   Hull, fittings & equipment: 394 tons, 48.3 %
   Fuel, ammunition & stores: 174 tons, 21.3 %
   Miscellaneous weights: 150 tons, 18.4 %
-50 t: Minesweeping kit
-50 t: Extra pumps, damage control kit, etc.
-46 t: Weight reserve
-4 t: 12 depth charges


Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,089 lbs / 948 Kg = 68.5 x 3.9 " / 100 mm shells or 1.1 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 1.0 ft / 0.3 m
   Roll period: 12.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.07
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has rise forward of midbreak
     and transom stern
   Block coefficient: 0.500
   Length to Beam Ratio: 6.67 : 1
   'Natural speed' for length: 16.58 kts
   Power going to wave formation at top speed: 51 %
   Trim (Max stability = 0, Max steadiness = 100): 25
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      18.04 ft / 5.50 m
      - Forecastle (20 %):   18.04 ft / 5.50 m
      - Mid (50 %):      18.04 ft / 5.50 m (10.17 ft / 3.10 m aft of break)
      - Quarterdeck (15 %):   10.17 ft / 3.10 m
      - Stern:      10.17 ft / 3.10 m
      - Average freeboard:   14.11 ft / 4.30 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 61.2 %
      - Above water (accommodation/working, high = better): 139.3 %
   Waterplane Area: 4,027 Square feet or 374 Square metres
   Displacement factor (Displacement / loading): 222 %
   Structure weight / hull surface area: 49 lbs/sq ft or 237 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.06
      - Longitudinal: 9.54
      - Overall: 1.31
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather