Al Ramadan, Al Tami, Al Shaab, Al Adrisi
Y Class Destroyers, ex-HMS Yeoman, Yonder, Yorker, Yukon
Transferred Q1/1948
Y Class, Great Britain Destroyer laid down 1928
Displacement:
1,543 t light; 1,606 t standard; 1,759 t normal; 1,881 t full load
Dimensions: Length overall / water x beam x draught
382.64 ft / 375.00 ft x 33.00 ft x 12.50 ft (normal load)
116.63 m / 114.30 m x 10.06 m x 3.81 m
Armament:
6 - 4.50" / 114 mm guns (3x2 guns), 45.00lbs / 20.41kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority aft, 1 raised mount aft - superfiring
4 - 1.57" / 40.0 mm guns (2x2 guns), 2.00lbs / 0.91kg shells, 1941 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
12 - 0.66" / 16.8 mm guns (2x6 guns), 0.14lbs / 0.06kg shells, 1936 Model
Machine guns in deck mounts
on side, all forward, all raised mounts - superfiring
Weight of broadside 280 lbs / 127 kg
Shells per gun, main battery: 175
6 - 24.5" / 622.3 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.50" / 13 mm - -
2nd: 0.50" / 13 mm - -
3rd: 0.50" / 13 mm - -
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 35,791 shp / 26,700 Kw = 34.00 kts
Range 5,500nm at 12.00 kts
Bunker at max displacement = 275 tons
Complement:
135 - 176
Cost:
£0.782 million / $3.129 million
Distribution of weights at normal displacement:
Armament: 35 tons, 2.0 %
Armour: 7 tons, 0.4 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 7 tons, 0.4 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 865 tons, 49.2 %
Hull, fittings & equipment: 555 tons, 31.6 %
Fuel, ammunition & stores: 216 tons, 12.3 %
Miscellaneous weights: 80 tons, 4.5 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
472 lbs / 214 Kg = 10.4 x 4.5 " / 114 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 1.3 ft / 0.4 m
Roll period: 12.0 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.50
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.398
Length to Beam Ratio: 11.36 : 1
'Natural speed' for length: 22.17 kts
Power going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 59
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: 21.00 ft / 6.40 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (34 %): 20.00 ft / 6.10 m (11.00 ft / 3.35 m aft of break)
- Quarterdeck (15 %): 11.00 ft / 3.35 m
- Stern: 11.00 ft / 3.35 m
- Average freeboard: 14.14 ft / 4.31 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 179.3 %
- Above water (accommodation/working, high = better): 78.6 %
Waterplane Area: 7,896 Square feet or 734 Square metres
Displacement factor (Displacement / loading): 68 %
Structure weight / hull surface area: 36 lbs/sq ft or 176 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.53
- Longitudinal: 1.63
- Overall: 0.59
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Refit notes
4.7in mounts replaced by 4.5in DP twin mounts
Two new pattern twin 2pdr AA mounts fitted to replace old qaud 2pdr
2 DCracks and two DCT for 32 DC
Asdic Type 142 added
Destroyer Search Type 275 set added
Destroyer Gunnery Type 286P added
Gunnery Director Type 282 added
1948 Iraq Refit
RDF sets upgraded to
Type 275 replaced with Type 970 surface search (X-Band)
Type 286P refurbished
Type 282 replaced by CRBF with Type 289