The turbine-powered ships displaced at
standard load and at
deep load. The ships measured
long overall with a
beam of . The turbine group had a
draught of . The ships' complement consisted of 85 officers and
ratings. The ships had two
Parsons geared
steam turbines, each driving one shaft, using steam provided by two
Admiralty three-drum boilers. The engines produced a total of and gave a maximum speed of . They carried a maximum of of
fuel oil that gave them a range of at . and four twin-gun mounts for
Oerlikon 20 mm cannon. The latter guns were in short supply when the first ships were being completed and they often got a proportion of single mounts. By 1944, single-barrel
Bofors 40 mm mounts began replacing the twin 20 mm mounts on a one for one basis. All of the ships were fitted for four throwers and two rails for
depth charges. ==Construction and career==