RM Tamar provides vital support for Royal Marines preparing for operations worldwide and for amphibious training and locates the units for the first time in one place next to their headquarters unit 1 Assault Group Royal Marines and alongside the berths for amphibious ships HMS Albion, HMS Bulwark and HMS Ocean. It houses 300 military personnel (plus up to 132 throughout the year on courses).
RM Tamar is home to 1 Assault Group Royal Marines. It also houses 539 Assault Squadron and 10 (Landing Craft) Training Squadron, and berths for the amphibious ships Bulwark, Albion and Ocean.