Royal Marines from 43 Commando Fleet Protection Group are silhouetted during a training exercise near Glen Fruin, Argyll and Bute, Scotland.
Located at HM Naval Base Clyde, 43 Commando help safeguard the ships and submarines at the Naval Base and those transiting the Firth of Clyde.
Each year the unit conducts dozens of Fleet directed operations around the globe, deploying Fleet Standby Rifle Teams and Maritime Sniper Teams. The 500-strong unit also supports Royal Navy counter-narcotics and counter-piracy missions, boarding and searching suspect ships in hot-spots around the world.
© Crown Copyright 2013
Photographer: CPOA(Phot) Thomas McDonald