2 berths (11 m variants), 4 berths (13.8 & 15 m variants), up to 9 crew (HMS Magpie); up to 36 passengers (13.8 m variant); up to 12 cadets (15 m officer training variants)
The Sea-class workboat has been procured for Britain's Royal Navy to undertake a number of roles, including: logistics and transport tasks, inshore and harbour survey work, diver training and support, officer training and providing passenger transfer modules for the aircraft carrierHMS Prince of Wales. An autonomous minehunting variant of the class has also been procured.
A procurement contract for £48M was awarded to Atlas Elektronik UK in September 2017 for the delivery of up to 38 vessels under the program. Deliveries began in 2018. All vessels, with the exception of HMS Magpie (the largest boat in the series), are non-commissioned assets within the Royal Navy.[3]
Vessel types and roles
The Sea-class workboat incorporates several variants, including:
10 x 11 m standard workboats for transport and logistics tasks;
3 x 11 m small survey modules (including units assigned to the ocean survey ship HMS Scott and the ice patrol ship HMS Protector);
3 x 13.8 m passenger transfer modules (assigned to HMS Prince of Wales);
17 x 15 m workboats for officer training, diver training/support and survey duties; and,
An autonomous minehunting vessel, also produced by Atlas Elektronik, is a derivative of the class (being identified by the navy as the Arcims-class).[7] Five 11-metre variants of the type (RNMBs Hussar, Hazard, Halcyon, Harrier and Hydra) were acquired by the Royal Navy and assigned to the Mine Threat and Exploitation Group at HMNB Clyde. The vessels have been procured under the Mine Hydrographic Capability (MHC) programme and are fitted with acoustic, electronic, and magnetic payloads that can emit signals through a towed craft to trigger mines into thinking that a target ship is passing by.[8] The boats can operate crewed, be remotely controlled or be pre-programmed to conduct missions autonomously.[9][10]
The 11 m boats can be transported on either the RAF's A400M or C-17 transport aircraft.[11] An additional 15-metre minehunting variant (RNMB Hebe) was also procured and similarly assigned to the Clyde naval base. The greater size of Hebe permits her to accommodate a Portable Operations Centre Afloat that allows her to control her sister vessels while also co-ordinating autonomous operations.[12]