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Besed Class Mine Warfare Ship
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There are 12 of the Besed class mine warfare ships in service with each of the Northern and Pacific Fleets.  Oil firing allows a significant increase in range, speed, and mine capacity, compared to the Volkov class.

Besed class Mine Warfare Ship, laid down 1919

Length, 70.0 m x Beam, 8.0 m x Depth, 2.3 m
610 tonnes normal displacement (487 tonnes standard)

Main battery: 2 x 10.0-cm
AA battery: 4 x 3.7-cm
Light battery: 4 x 1.3-cm

Weight of broadside: 31 kg

Hull unarmored

Battery armor:
Main, 2.5 cm shields
AA, 2.5 cm shields

50 tons minesweeping equipment, 75 tons mines.

Maximum speed for 2029 shaft kw = 19.00 knots
Approximate cruising radius, 4000 nm / 15 knots

Typical complement: 61-80


Estimated cost, $323,000 (81,000)

Remarks:

Oil firing.

Good seaboat; rides out heavy weather easily.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 8 tonnes = 1 pct
Armor, total ..................... 3 tonnes = 1 pct

Armament 3 tonnes = 1 pct

Machinery ........................ 97 tonnes = 16 pct
Hull and fittings; equipment ..... 236 tonnes = 39 pct
Fuel, ammunition, stores ......... 141 tonnes = 23 pct
Miscellaneous weights ............ 125 tonnes = 20 pct
-----
610 tonnes = 100 pct

Estimated metacentric height, 0.3 m

Displacement summary:

Light ship: 469 tonnes
Standard displacement: 487 tonnes
Normal service: 610 tonnes
Full load: 706 tonnes

Loading submergence 340 tonnes/metre

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Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.13

Shellfire needed to sink: 435 kg = 31.4 x 10.0-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 0.6
(Approximates number of 'typical'
torpedo hits needed to sink ship)

Relative steadiness as gun platform, 65 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.12

Relative quality as a seaboat: 1.30

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Hull form characteristics:

Block coefficient: 0.47
Sharpness coefficient: 0.34
Hull speed coefficient 'M' = 8.27
'Natural speed' for length = 15.2 knots
Power going to wave formation
at top speed: 52 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 85 percent

Relative accommodation and working space: 100 percent


Displacement factor: 157 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 0.98
(Structure weight per square
metre of hull surface: 192 kg)

Relative longitudinal hull strength: 1.64
(for 2.70 m average freeboard;
freeboard adjustment +0.06 m)

Relative composite hull strength: 1.03

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[Machine-readable parameters: Spring Style v. 1.2.1]

229.60 x 26.24 x 7.54; 8.86 -- Dimensions
0.47 -- Block coefficient
1919 -- Year laid down
19.00 / 4000 / 15.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
125 tons -- Miscellaneous weights
++++++++++
2 x 3.94; 0 -- Main battery; turrets
Central positioning of guns
Gun-shields
:
0 -- No secondary battery
4 x 1.46 -- Tertiary (QF/AA) battery
Gun-shields
:
4 x 0.51 -- Fourth (light) battery
0 -- No torpedo armament
++++++++++
0.00 -- No belt armor
0.00 / 0.00 -- Deck / CT
0.98 / 0.00 / 0.98 / 0.00 -- Battery armor


(Note: For portability, values are stored in Anglo-American units)


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