Anchusa class sloop

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HMS President on the Thames
Class overview
Name: Flower class, Anchusa type
Operators: Naval flag of United Kingdom Royal Navy
Preceded by: Cadmus class sloop
Succeeded by: Kil class sloop
In service: - 1988
In commission: 1917
Completed: 28
General characteristics
Type: sloop
Displacement: 1,290 tons
Length: 250 ft (p/p), 262.25 (overall)
Beam: 35 feet
Draught: 11 ft 6 in (mean), 12 ft 6 inch - 13 ft 8 inch (deep)
Propulsion: 1 screw, 4-cylinder triple expansion, 2 boilers. 2,500 hp
Speed: 16 kts
Range: Coal: 260 tons
Complement: 93 men
Armament: Designed to mount 2 x 12 pdr., 1 x 7.5 howitzer or 1 x 200 lb stick-bomb howitzer, 4 x Depth Charge Throwers, but actually armed with 2 x 4 inch, 1 or 2 x 12 pdr. and D.C. Throwers.


The twenty-eight Anchusa class sloops were built under the Emergency War Programme for the Royal Navy in World War I as the final part of the larger "Flower Class", which were also referred to as the "Cabbage Class", or "Herbaceous Borders".

They were single-screw Fleet Sweeping Vessels (Sloops) with triple hulls at the bows to give extra protection against loss when working.

The Anchusa class of corvettes or convoy sloops were completed in 1917 and 1918. They were a small class of convoy protection ships built to look like merchant ships for use as Q-ships in World War I.

A surviving example is HMS Saxifrage, completed in 1918 and renamed in 1922 as HMS President.

[edit] Ships

These ships were Q-ships, which were disguised as normal mercantile shipping within convoys. Six ships were ordered on 1 January 1917:

Two more ships were ordered on 15 January 1917:

Twenty more ships were ordered on 21 February 1917:

[edit] See also