Patrol Craft

[The Rock Doctor]

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[The Rock Doctor]

P-1 Class Patrol Boat

This small warship is intended for harbour patrol, customs inspections, and short-range patrols from established harbours.  It's been built in dribs and drabs on a continious basis for several years.

Two units have been lost to accidents since completion.

P-1 to P-8, laid down 1893
P-9 to P-16, laid down 1894; P-11 lost, 1897
P-17 to P-24, laid down 1895
P-25 to P-32, laid down 1896
P-33 to P-40, laid down 1897; P-38 lost, 1899
P-41 to P-48, laid down 1898

Enter ship name, Enter country Enter ship type laid down 1893 (Engine 1890)

Displacement:
   47 t light; 49 t standard; 50 t normal; 52 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (85.30 ft / 82.02 ft) x 16.40 ft x (2.62 / 2.68 ft)
   (26.00 m / 25.00 m) x 5.00 m  x (0.80 / 0.82 m)

Armament:
      1 - 1.97" / 50.0 mm 40.0 cal gun - 3.66lbs / 1.66kg shells, 400 per gun
     Quick firing gun in deck mount, 1893 Model
     1 x Single mount on centreline, forward deck centre
      3 - 0.31" / 8.0 mm 45.0 cal guns - 0.02lbs / 0.01kg shells, 15,000 per gun
     Machine guns in deck mounts, 1893 Model
     2 x Single mounts on sides, aft deck forward
     1 x Single mount on centreline, aft deck centre
      Weight of broadside 4 lbs / 2 kg

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

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 111 ihp / 83 Kw = 11.00 kts
   Range 300nm at 8.00 kts
   Bunker at max displacement = 3 tons (100% coal)

Complement:
   9 - 12

Cost:
   £0.005 million / $0.019 million

Distribution of weights at normal displacement:
   Armament: 1 tons, 1.6 %
      - Guns: 1 tons, 1.6 %
   Armour: 1 tons, 1.8 %
      - Armament: 1 tons, 1.8 %
   Machinery: 21 tons, 42.6 %
   Hull, fittings & equipment: 23 tons, 46.5 %
   Fuel, ammunition & stores: 4 tons, 7.6 %
   Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     58 lbs / 26 Kg = 1.7 x 6 " / 152 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.72
   Metacentric height 0.8 ft / 0.2 m
   Roll period: 7.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0.02
   Seaboat quality  (Average = 1.00): 1.28

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.503
   Length to Beam Ratio: 5.00 : 1
   'Natural speed' for length: 9.06 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 47
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 3.28 ft / 1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   15.00 %,  5.25 ft / 1.60 m,  5.25 ft / 1.60 m
      - Forward deck:   20.00 %,  5.25 ft / 1.60 m,  5.25 ft / 1.60 m
      - Aft deck:   35.00 %,  5.25 ft / 1.60 m,  5.25 ft / 1.60 m
      - Quarter deck:   30.00 %,  5.25 ft / 1.60 m,  5.25 ft / 1.60 m
      - Average freeboard:      5.25 ft / 1.60 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 144.0 %
      - Above water (accommodation/working, high = better): 99.6 %
   Waterplane Area: 896 Square feet or 83 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 19 lbs/sq ft or 94 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 3.38
      - Overall: 1.01
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Good seaboat, rides out heavy weather easily

[The Rock Doctor]

Plovdiv Class Aviso

A combination gunboat/dispatch boat for miscellaneous tasks around the Empire.  Names pending.

Plovdiv, laid down 1893
Kavala, laid down 1894
Balikesir, laid down 1894
Kutahya, laid down 1894
Karabuk, laid down 1894
Usak, laid down 1897
Latakia, laid down 1897
Ar Raqqah, laid down 1897
Petra, laid down 1897
Faiyum, laid down 1898

Enter ship name, Enter country Enter ship type laid down 1890

Displacement:
   568 t light; 591 t standard; 726 t normal; 835 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (200.13 ft / 196.85 ft) x 26.25 ft x (9.84 / 10.95 ft)
   (61.00 m / 60.00 m) x 8.00 m  x (3.00 / 3.34 m)

Armament:
      2 - 4.13" / 105 mm 40.0 cal guns - 30.86lbs / 14.00kg shells, 150 per gun
     Breech loading guns in deck mounts, 1890 Model
     2 x Single mounts on centreline ends, evenly spread
      2 - 3.46" / 88.0 mm 35.0 cal guns - 15.43lbs / 7.00kg shells, 150 per gun
     Breech loading guns in deck mounts, 1890 Model
     2 x Single mounts on sides, forward deck aft
      2 - 0.31" / 8.0 mm 45.0 cal guns - 0.02lbs / 0.01kg shells, 15,000 per gun
     Machine guns in deck mounts, 1890 Model
     2 x Single mounts on sides, aft deck forward
      Weight of broadside 93 lbs / 42 kg

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

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 1,072 ihp / 800 Kw = 14.28 kts
   Range 4,000nm at 10.00 kts
   Bunker at max displacement = 244 tons (100% coal)

Complement:
   69 - 90

Cost:
   £0.053 million / $0.214 million

Distribution of weights at normal displacement:
   Armament: 14 tons, 2.0 %
      - Guns: 14 tons, 2.0 %
   Armour: 4 tons, 0.5 %
      - Armament: 4 tons, 0.5 %
   Machinery: 208 tons, 28.6 %
   Hull, fittings & equipment: 290 tons, 40.0 %
   Fuel, ammunition & stores: 158 tons, 21.8 %
   Miscellaneous weights: 52 tons, 7.2 %
      - Hull above water: 52 tons
      -20 t:  Accommodation for 10 passengers
      -20 t:  Cargo hold
      -12 t:  Weight reserve

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,006 lbs / 456 Kg = 28.5 x 4.1 " / 105 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.33
   Metacentric height 1.1 ft / 0.3 m
   Roll period: 10.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.20
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.500 / 0.517
   Length to Beam Ratio: 7.50 : 1
   'Natural speed' for length: 14.03 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 35
   Bow angle (Positive = bow angles forward): 0.00 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 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
      - Forward deck:   30.00 %,  13.12 ft / 4.00 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:      13.12 ft / 4.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 107.3 %
      - Above water (accommodation/working, high = better): 124.7 %
   Waterplane Area: 3,442 Square feet or 320 Square metres
   Displacement factor (Displacement / loading): 141 %
   Structure weight / hull surface area: 39 lbs/sq ft or 192 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.80
      - Longitudinal: 7.09
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[The Rock Doctor]

Vlore Class Gunboat

An armored gunboat for patrol and auxiliary escort.  There is less capability as a dispatch boat in comparison to the preceding Plovdiv type.

Vlore, laid down 1901
Tyre, laid down 1901
Acre, laid down 1902
Eilat, laid down 1902
Urfa, laid down 1903
Mersin, laid down 1903

Enter ship name, Enter country Enter ship type laid down 1900

Displacement:
   499 t light; 521 t standard; 582 t normal; 631 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (178.81 ft / 175.52 ft) x 26.25 ft x (9.02 / 9.59 ft)
   (54.50 m / 53.50 m) x 8.00 m  x (2.75 / 2.92 m)

Armament:
      2 - 4.13" / 105 mm 40.0 cal guns - 33.85lbs / 15.36kg shells, 200 per gun
     Quick firing guns in deck mounts, 1900 Model
     2 x Single mounts on centreline, evenly spread
      4 - 1.97" / 50.0 mm 45.0 cal guns - 3.66lbs / 1.66kg shells, 200 per gun
     Quick firing guns in deck mounts, 1900 Model
     4 x Single mounts on sides, evenly spread
      4 - 0.31" / 8.0 mm 45.0 cal guns - 0.02lbs / 0.01kg shells, 15,000 per gun
     Machine guns in deck mounts, 1900 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 82 lbs / 37 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.18" / 30 mm   111.55 ft / 34.00 m   7.87 ft / 2.40 m
   Ends:   Unarmoured
     Main Belt covers 98 % of normal length

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

   - Protected deck - single deck:
   For and Aft decks: 0.79" / 20 mm
   Forecastle: 0.79" / 20 mm  Quarter deck: 0.79" / 20 mm

   - Conning towers: Forward 1.18" / 30 mm, Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 938 ihp / 700 Kw = 14.13 kts
   Range 2,400nm at 10.00 kts
   Bunker at max displacement = 110 tons (100% coal)

Complement:
   59 - 77

Cost:
   £0.042 million / $0.167 million

Distribution of weights at normal displacement:
   Armament: 14 tons, 2.4 %
      - Guns: 14 tons, 2.4 %
   Armour: 100 tons, 17.2 %
      - Belts: 45 tons, 7.7 %
      - Armament: 9 tons, 1.5 %
      - Armour Deck: 45 tons, 7.7 %
      - Conning Tower: 2 tons, 0.3 %
   Machinery: 147 tons, 25.2 %
   Hull, fittings & equipment: 209 tons, 36.0 %
   Fuel, ammunition & stores: 83 tons, 14.2 %
   Miscellaneous weights: 29 tons, 5.0 %
      - On freeboard deck: 24 tons
      - Above deck: 5 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,068 lbs / 485 Kg = 30.3 x 4.1 " / 105 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.33
   Metacentric height 1.1 ft / 0.3 m
   Roll period: 10.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.19
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.490 / 0.500
   Length to Beam Ratio: 6.69 : 1
   'Natural speed' for length: 13.25 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 35
   Bow angle (Positive = bow angles forward): 0.00 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 %,  12.47 ft / 3.80 m,  12.47 ft / 3.80 m
      - Forward deck:   30.00 %,  12.47 ft / 3.80 m,  12.47 ft / 3.80 m
      - Aft deck:   35.00 %,  12.47 ft / 3.80 m,  12.47 ft / 3.80 m
      - Quarter deck:   15.00 %,  12.47 ft / 3.80 m,  12.47 ft / 3.80 m
      - Average freeboard:      12.47 ft / 3.80 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 89.6 %
      - Above water (accommodation/working, high = better): 122.4 %
   Waterplane Area: 3,042 Square feet or 283 Square metres
   Displacement factor (Displacement / loading): 127 %
   Structure weight / hull surface area: 34 lbs/sq ft or 168 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.80
      - Longitudinal: 7.45
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather