WesWorld

Fleet Tenders
Atiya-class Collier-Oiler
- BVK Atiya - MTK-01 (ex-CNS Angamos, ex-SS Citta di Venezia)

Stara Planina-class Fleet Tender
- BVK Stara Planina - MTK-02
- BVK Rhodopi - MTK-03

Harbour Craft
Tants-class Light Tugs
- BVK Kopanitsa (SV-01) - 1937
- BVK Paidushko Horo (SV-02) - 1938
- BVK Rachenitsa (SV-03) - 1938

Tropanka-class Netlayer
- BVK Tropanka
- BVK Lesnoto
- BVK Svornato

Atiya, Bulgarian Collier-Oiler laid down 1890 (Engine 1913)

Displacement:
6,511 t light; 6,676 t standard; 8,003 t normal; 9,064 t full load

Dimensions: Length overall / water x beam x draught
415.00 ft / 405.00 ft x 56.00 ft x 19.00 ft (normal load)
126.49 m / 123.44 m x 17.07 m x 5.79 m

Armament:
1 - 4.13" / 105 mm guns in single mounts, 35.32lbs / 16.02kg shells, 1890 Model
Quick firing gun in deck mount
on centreline forward
2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1913 Model
Machine guns in deck mounts
on side, all amidships
Weight of broadside 35 lbs / 16 kg
Shells per gun, main battery: 250

Machinery:
Oil fired boilers, complex reciprocating steam engines,
Geared drive, 1 shaft, 2,272 ihp / 1,695 Kw = 12.00 kts
Range 12,500nm at 12.00 kts
Bunker at max displacement = 2,388 tons

Complement:
422 - 549

Cost:
£0.251 million / $1.003 million

Distribution of weights at normal displacement:
Armament: 4 tons, 0.1 %
Machinery: 136 tons, 1.7 %
Hull, fittings & equipment: 3,370 tons, 42.1 %
Fuel, ammunition & stores: 1,492 tons, 18.6 %
Miscellaneous weights: 3,000 tons, 37.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
16,616 lbs / 7,537 Kg = 470.4 x 4.1 " / 105 mm shells or 3.2 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 2.4 ft / 0.7 m
Roll period: 15.1 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has raised forecastle, raised quarterdeck
Block coefficient: 0.650
Length to Beam Ratio: 7.23 : 1
'Natural speed' for length: 20.12 kts
Power going to wave formation at top speed: 25 %
Trim (Max stability = 0, Max steadiness = 100): 26
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 10.00 ft / 3.05 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.00 ft / 7.32 m
- Forecastle (20 %): 23.00 ft / 7.01 m (15.00 ft / 4.57 m aft of break)
- Mid (50 %): 15.00 ft / 4.57 m
- Quarterdeck (15 %): 22.00 ft / 6.71 m (15.00 ft / 4.57 m before break)
- Stern: 22.00 ft / 6.71 m
- Average freeboard: 17.73 ft / 5.40 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 47.9 %
- Above water (accommodation/working, high = better): 116.0 %
Waterplane Area: 17,131 Square feet or 1,592 Square metres
Displacement factor (Displacement / loading): 242 %
Structure weight / hull surface area: 127 lbs/sq ft or 621 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.57
- Longitudinal: 2.65
- Overall: 1.65
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

Notes:
Laid down 1890, refitted 1913. Acquired 1937 from Chile. Ex-CNS Angamos, ex-SS Citta di Venezia.

Tants-class, Bulgarian Military Tug laid down 1937

Displacement:
235 t light; 252 t standard; 336 t normal; 403 t full load

Dimensions: Length overall / water x beam x draught
175.00 ft / 175.00 ft x 25.00 ft x 7.00 ft (normal load)
53.34 m / 53.34 m x 7.62 m x 2.13 m

Armament:
1 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1937 Model
Dual purpose gun in deck mount
on centreline forward
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1937 Model
Machine guns in deck mounts
on side, all amidships
Weight of broadside 22 lbs / 10 kg
Shells per gun, main battery: 800

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 1,036 shp / 773 Kw = 16.00 kts
Range 4,000nm at 16.00 kts
Bunker at max displacement = 151 tons

Complement:
39 - 51

Cost:
£0.079 million / $0.317 million

Distribution of weights at normal displacement:
Armament: 3 tons, 0.8 %
Machinery: 29 tons, 8.5 %
Hull, fittings & equipment: 174 tons, 51.7 %
Fuel, ammunition & stores: 101 tons, 30.0 %
Miscellaneous weights: 30 tons, 8.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,225 lbs / 556 Kg = 58.9 x 3.5 " / 88 mm shells or 1.1 torpedoes
Stability (Unstable if below 1.00): 1.28
Metacentric height 1.0 ft / 0.3 m
Roll period: 10.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.05
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.384
Length to Beam Ratio: 7.00 : 1
'Natural speed' for length: 13.23 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 14.34 ft / 4.37 m
- Forecastle (20 %): 9.13 ft / 2.78 m
- Mid (50 %): 9.13 ft / 2.78 m
- Quarterdeck (15 %): 9.13 ft / 2.78 m
- Stern: 9.13 ft / 2.78 m
- Average freeboard: 9.55 ft / 2.91 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 47.6 %
- Above water (accommodation/working, high = better): 119.1 %
Waterplane Area: 2,672 Square feet or 248 Square metres
Displacement factor (Displacement / loading): 308 %
Structure weight / hull surface area: 38 lbs/sq ft or 185 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.06
- Longitudinal: 4.61
- Overall: 1.23
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Breakdown of Miscellaneous Weights:
- 20 tons for salvage crane and winch
- 10 tons for other assorted tugboat equipment

Ships in Class:
- BVK Kopanitsa (SV-01) - 1937
- BVK Paidushko Horo (SV-02) - 1938
- BVK Rachenitsa (SV-03) - 1938

Notes:
The Tants-class come equipped with Voith Schneider propellers for better maneuverability during working operations.

Stara Planina, Bulgarian Fleet Tender laid down 1943

Displacement:
2,783 t light; 2,914 t standard; 4,060 t normal; 4,977 t full load

Dimensions: Length overall / water x beam x draught
369.25 ft / 360.89 ft x 47.57 ft x 14.27 ft (normal load)
112.55 m / 110.00 m x 14.50 m x 4.35 m

Armament:
8 - 2.24" / 57.0 mm guns (4x2 guns), 6.61lbs / 3.00kg shells, 1943 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1943 Model
Machine guns in deck mounts
on side, all amidships
Weight of broadside 54 lbs / 24 kg
Shells per gun, main battery: 1,640

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

- Armour deck: 0.79" / 20 mm, Conning tower: 2.17" / 55 mm

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 6,452 shp / 4,813 Kw = 18.00 kts
Range 17,000nm at 15.00 kts
Bunker at max displacement = 2,063 tons

Complement:
253 - 330

Cost:
£0.828 million / $3.313 million

Distribution of weights at normal displacement:
Armament: 7 tons, 0.2 %
Armour: 198 tons, 4.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 6 tons, 0.2 %
- Armour Deck: 180 tons, 4.4 %
- Conning Tower: 12 tons, 0.3 %
Machinery: 167 tons, 4.1 %
Hull, fittings & equipment: 1,112 tons, 27.4 %
Fuel, ammunition & stores: 1,278 tons, 31.5 %
Miscellaneous weights: 1,300 tons, 32.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
9,134 lbs / 4,143 Kg = 1,616.5 x 2.2 " / 57 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 2.2 ft / 0.7 m
Roll period: 13.4 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.03
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.580
Length to Beam Ratio: 7.59 : 1
'Natural speed' for length: 19.00 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.97 ft / 7.00 m
- Forecastle (25 %): 19.69 ft / 6.00 m
- Mid (50 %): 16.40 ft / 5.00 m (9.84 ft / 3.00 m aft of break)
- Quarterdeck (15 %): 9.84 ft / 3.00 m
- Stern: 9.84 ft / 3.00 m
- Average freeboard: 14.68 ft / 4.48 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 51.8 %
- Above water (accommodation/working, high = better): 123.0 %
Waterplane Area: 12,324 Square feet or 1,145 Square metres
Displacement factor (Displacement / loading): 215 %
Structure weight / hull surface area: 60 lbs/sq ft or 292 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.49
- 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

Notes:
Up to 1,500 tons of fuel can be earmarked for transfer to other craft.

Breakdown of Miscellaneous Weights:
- 115 tons for 7200 rounds of 105mm ammunition or 3782 rounds of 130mm ammunition
- 36 tons for 36,000 rounds of 40mm ammunition
- 249 tons for machine shop and repair facilities
- 50 tons for cranes and boat handling equipment (can lift MTBs onto aft deck for repair)
- 150 tons for 75 transient crewmen (MTB base ship)
- 350 tons for consumables
- 350 tons for parts

Ships in Class:
- Stara Planina: laid down January 1943, completed December 1943.
- Rodopi: laid down April 1943, completed March 1944.

Tropanka-class, Bulgarian Netlayer laid down 1943

Displacement:
235 t light; 248 t standard; 277 t normal; 300 t full load

Dimensions: Length overall / water x beam x draught
184.36 ft / 173.88 ft x 24.61 ft x 5.25 ft (normal load)
56.19 m / 53.00 m x 7.50 m x 1.60 m

Armament:
2 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1943 Model
Dual purpose guns in deck mounts
on centreline ends, evenly spread
2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1943 Model
Machine guns in deck mounts
on side, all amidships
Weight of broadside 42 lbs / 19 kg
Shells per gun, main battery: 300

Machinery:
Diesel Internal combustion motors,
Geared drive, 1 shaft, 741 shp / 553 Kw = 15.00 kts
Range 3,400nm at 12.00 kts
Bunker at max displacement = 52 tons

Complement:
33 - 44

Cost:
£0.100 million / $0.402 million

Distribution of weights at normal displacement:
Armament: 5 tons, 1.9 %
Machinery: 19 tons, 6.9 %
Hull, fittings & equipment: 141 tons, 50.9 %
Fuel, ammunition & stores: 42 tons, 15.0 %
Miscellaneous weights: 70 tons, 25.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
779 lbs / 354 Kg = 37.5 x 3.5 " / 88 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 0.7 ft / 0.2 m
Roll period: 12.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.14
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.432
Length to Beam Ratio: 7.07 : 1
'Natural speed' for length: 13.19 kts
Power going to wave formation at top speed: 47 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 15.42 ft / 4.70 m
- Forecastle (20 %): 15.09 ft / 4.60 m
- Mid (50 %): 8.20 ft / 2.50 m
- Quarterdeck (15 %): 8.20 ft / 2.50 m
- Stern: 8.53 ft / 2.60 m
- Average freeboard: 10.66 ft / 3.25 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 66.7 %
- Above water (accommodation/working, high = better): 144.4 %
Waterplane Area: 2,555 Square feet or 237 Square metres
Displacement factor (Displacement / loading): 184 %
Structure weight / hull surface area: 29 lbs/sq ft or 143 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.83
- Longitudinal: 5.23
- 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

Ships in Class:
- BVK Tropanka
- BVK Lesnoto
- BVK Svornato

Notes:
The Tropanka-class come equipped with Voith Schneider propellers for better maneuverability during working operations.