Displacement:          650 tons (standard),

                                1,025 tons (full war load)

Length:                      186 ft (57 m)

Beam:                        31 ft (9.4 m)

Draught:                   8.5 ft (2.6 m)

Propulsion:              triple expansion

                                  engine, 2 shafts

Speed:                       15 knots (28 km/h;

                                  17 mph) at 1,750 hp

Complement:           85

Armament:              1 × 12-pounder gun

                                  (later replaced

                                  by 1 × 4-inch gun),

                                  3 × Oerlikons

                                 (1 later removed),

                                  1 × Bofors

                                  (installed later),

                                  Machine guns,

                                  Depth charges

                                  chutes and throwers