Science and Exploration vessels

[Nobody]

Explorer-class: "Polarstern" and "Aurora", Orange Science and Exploration vessels laid down 1917 (Engine 1916)

Displacement:
   2.880 t light; 2.965 t standard; 4.074 t normal; 4.961 t full load

Dimensions: Length overall / water x beam x draught
   393,69 ft / 390,42 ft x 63,98 ft x 9,84 ft (normal load)
   120,00 m / 119,00 m x 19,50 m  x 3,00 m

Armament:
      2 - 3,00" / 76,2 mm guns in single mounts, 13,50lbs / 6,12kg shells, 1914 Model
     Breech loading guns in deck mounts
     on centreline ends, evenly spread
      4 - 0,31" / 8,0 mm guns in single mounts, 0,02lbs / 0,01kg shells, 1917 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
      1 - 1,00" / 25,4 mm guns in single mounts, 0,50lbs / 0,23kg shells, 1917 Model
     Anti-aircraft gun in deck mount
     on centreline amidships, 1 raised gun
   Weight of broadside 28 lbs / 13 kg
   Shells per gun, main battery: 250

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0,24" / 6 mm   259,19 ft / 79,00 m   14,76 ft / 4,50 m
   Ends:   0,59" / 15 mm   131,23 ft / 40,00 m   18,04 ft / 5,50 m
     Main Belt covers 102% of normal length

   - Torpedo Bulkhead:
      0,31" / 8 mm   295,28 ft / 90,00 m   11,48 ft / 3,50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm         -               -

   - Armour deck: 0,39" / 10 mm, Conning tower: 0,39" / 10 mm

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 8.200 ihp / 6.117 Kw = 18,86 kts
   Range 12.030nm at 12,00 kts
   Bunker at max displacement = 1.996 tons (70% coal)

Complement:
   254 - 331

Cost:
   £0,321 million / $1,284 million

Distribution of weights at normal displacement:
   Armament: 3 tons, 0,1%
   Armour: 265 tons, 6,5%
      - Belts: 91 tons, 2,2%
      - Torpedo bulkhead: 40 tons, 1,0%
      - Armament: 1 tons, 0,0%
      - Armour Deck: 131 tons, 3,2%
      - Conning Tower: 2 tons, 0,1%
   Machinery: 520 tons, 12,8%
   Hull, fittings & equipment: 1.471 tons, 36,1%
   Fuel, ammunition & stores: 1.194 tons, 29,3%
   Miscellaneous weights: 620 tons, 15,2%

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     11.786 lbs / 5.346 Kg = 873,0 x 3,0 " / 76 mm shells or 2,9 torpedoes
   Stability (Unstable if below 1.00): 1,59
   Metacentric height 5,6 ft / 1,7 m
   Roll period: 11,4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0,00
   Seaboat quality  (Average = 1.00): 1,52

Hull form characteristics:
   Hull has raised forecastle, raised quarterdeck
   Block coefficient: 0,580
   Length to Beam Ratio: 6,10 : 1
   'Natural speed' for length: 19,76 kts
   Power going to wave formation at top speed: 43 %
   Trim (Max stability = 0, Max steadiness = 100): 46
   Bow angle (Positive = bow angles forward): 5,00 degrees
   Stern overhang: 1,38 ft / 0,42 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      21,65 ft / 6,60 m
      - Forecastle (20%):   18,04 ft / 5,50 m (14,44 ft / 4,40 m aft of break)
      - Mid (50%):      13,78 ft / 4,20 m
      - Quarterdeck (15%):   14,11 ft / 4,30 m (13,78 ft / 4,20 m before break)
      - Stern:      16,40 ft / 5,00 m
      - Average freeboard:   15,24 ft / 4,65 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 86,9%
      - Above water (accommodation/working, high = better): 187,3%
   Waterplane Area: 17.929 Square feet or 1.666 Square metres
   Displacement factor (Displacement / loading): 209%
   Structure weight / hull surface area: 65 lbs/sq ft or 316 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,97
      - Longitudinal: 1,22
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   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

Armor represents reinforced hull and bottom, to allow usage in treacherous waters (artic, coral reefs etc.)

misc. includes
2 long range radio sets (=50 t)
Radar (testing new technology)
labs
workshops
expedition equipment
medical facilities
leisure room
library
2 Barkassen (40 t each, total of 160 t including derricks)



Barkasse, Orange Barkasse, Explorer-class Tochterboot laid down 1918 (Engine 1916), 4 build

Displacement:
   40 t light; 41 t standard; 45 t normal; 49 t full load

Dimensions: Length overall / water x beam x draught
   85,31 ft / 78,74 ft x 13,12 ft x 2,72 ft (normal load)
   26,00 m / 24,00 m x 4,00 m  x 0,83 m

Armament:
      1 - 0,31" / 8,0 mm guns in single mounts, 0,02lbs / 0,01kg shells, 1918 Model
     Machine gun in deck mount
     on centreline forward
   Weight of broadside 0 lbs / 0 kg
   Shells per gun, main battery: 1.500

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 300 ihp / 224 Kw = 14,14 kts
   Range 640nm at 11,00 kts
   Bunker at max displacement = 8 tons (100% coal)

Complement:
   8 - 11

Cost:
   £0,008 million / $0,033 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0,0%
   Machinery: 20 tons, 43,1%
   Hull, fittings & equipment: 20 tons, 44,6%
   Fuel, ammunition & stores: 6 tons, 12,3%
   Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     45 lbs / 20 Kg = 2.881,4 x 0,3 " / 8 mm shells or 0,1 torpedoes
   Stability (Unstable if below 1.00): 1,24
   Metacentric height 0,4 ft / 0,1 m
   Roll period: 9,3 seconds
   Steadiness   - As gun platform (Average = 50 %): 58 %
         - Recoil effect (Restricted arc if above 1.00): 0,00
   Seaboat quality  (Average = 1.00): 1,16

Hull form characteristics:
   Hull has raised forecastle, raised quarterdeck
   Block coefficient: 0,565
   Length to Beam Ratio: 6,00 : 1
   'Natural speed' for length: 8,87 kts
   Power going to wave formation at top speed: 69 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 20,00 degrees
   Stern overhang: 2,99 ft / 0,91 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      9,84 ft / 3,00 m
      - Forecastle (20%):   7,87 ft / 2,40 m (5,91 ft / 1,80 m aft of break)
      - Mid (50%):      5,25 ft / 1,60 m
      - Quarterdeck (15%):   6,56 ft / 2,00 m (5,91 ft / 1,80 m before break)
      - Stern:      7,22 ft / 2,20 m
      - Average freeboard:   6,39 ft / 1,95 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 139,8%
      - Above water (accommodation/working, high = better): 94,4%
   Waterplane Area: 711 Square feet or 66 Square metres
   Displacement factor (Displacement / loading): 116%
   Structure weight / hull surface area: 14 lbs/sq ft or 71 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,78
      - Longitudinal: 8,88
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is adequate