The four GPO vessels are of equal design with the following characteristics:

Name GPO Grace, GPO Amethyst, GPO Sapphire & GPO Emerald
Length 225.00 m
Breadth 48.00 m
Free deck Space: 183 x 48 m
Depth 13.80 m
Draft 10.68 m
Deadweight 64,000 t
Submerging depth: 15.00 m
Buoyancy towers Fully removable by vessel crew
Bow thrusters 2 x 1,750 kW
Stern thrusters 2 x 1,000 kW
Propulsion 2 x 8,000 kW (CPP – full feathering)
Class DnV-GL:  X 1A1 SEMI-SUBMERSIBLE HEAVY TRANSPORT VESSEL, E0, DYNPOS-AUTR, CLEAN, DK(+), RPS, PWDK, COAT-PSPC(B), BIS, TMON, ICE-1C, NAUT-OC
Dynamic Positioning DP2

The Vessels are designed to carry the following cargoes as a minimum:

cargo table