When it comes to acronyms (FOST) the Fleet Operational Sea Training organisation comes with a renowned global reputation – and is second to none.

HMS St Albans on FOST Training with HMS Iron Duke at the Plymouth Breakwater

FOST is tailor-made, and is responsible for ensuring the Royal Navy and Royal Fleet Auxiliary vessels are fit to join the operational fleet, and works with other NATO and international navies – offering its world class guidance and services.

Many ships have been spotted on our 24-hour live webcam conducting sea trials throughout the year in the Sound and around the South West coastline. 

Dedicated FOST Ships are centred in Plymouth, and FOST Submarines at Faslane in Scotland.

HMS Vanguard leaving Devonport Dockyard after its refit and on its way to Faslane in 2023

The training is focussed on operational activities including preparatory safety and readiness training, threat, and multi-threat scenarios, to advanced tactical training at Task Group level. 

When ships are on FOST the crews and vessels encounter the realism of battle damage simulations, and all aspects of war fighting.

In 2020, FOST was re-structured as part of the Royal Navy’s transformation programme, and all training was tailored to the needs of the individual vessels and the missions it may take. 

Under the new structure, FOST no longer designs the training syllabus, and is usually set by SURFLOT or SUBFLOT. 

German warship FGS Hamburg on FOST Training around Plymouth and South West waters

For over half a century, FOST has provided many NATO and non-NATO nations with extensive exercise locations around the South West and British waters.

FOST has been delivering its global reputation for Operational Sea Training for the Royal Navy since 1958.

RFA Proteus first arrived in Plymouth Sound in March 2023 and spotted on our 24 hour webcam.