AOPV 430 Harry DeWolf and AOPV 431 Margaret Brooke in Halifax
- Displacement: 6,615 t (6,511 long tons)
- Length: 103.6 m (339 ft 11 in)
- Beam: 19 m (62 ft 4 in)
- Ice class: Polar Class 5
- Installed power: Four 3.6 MW (4,800 hp) diesel generators
- Propulsion: Diesel-electric; two shafts (2 × 4.5 MW (6,000 hp))
- Speed:
◾17 knots (31 km/h; 20 mph) (open water)
◾3 knots (5.6 km/h; 3.5 mph) (icebreaking) - Range: 6,800 nmi (12,600 km; 7,800 mi)
- Boats & landing craft carried:
- Two Rosborough Rough Water 8.5m Multi-Role Rescue Boats
- One ABCO Industries 12m landing craft
- Complement: 5 (RCN). Accommodation for 87
- Sensors and processing systems:
- SATCOM (Link 16)
- Multichannel VHF/HF Radio
- Anti-missile detect systems
- OSI Maritime Systems Integrated Bridge Navigational System
- Kelvin Hughes SharpEye X and S-band navigation radars
- AGEM Damage/Machinery Control Systems
- Armament:
- 1 × BAE Mk 38 25 mm (0.98 in) gun
- 2 × M2 Browning machine gun
- Aircraft carried:
- Sikorsky CH-148 Cyclone, or
- Bell CH-146 Griffon (RCAF) and/or CU-176 Gargoyle UAV