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 × 4-inch gun

                                    (later replaced

                                    by 1 × 12-pounder gun

                                    then reinstalled)

                                    3 × 20 mmOerlikons

                                   (later 2)

                                    1 × 40 mm Bofors

                                    (installed later)

                                    Machine guns

                                    Depth charges

                                    chutes and throwers