Royal Naval Armaments Depot Coulport, shortened to RNAD Coulport, on Loch Long in Argyll, Scotland, is the storage and loading facility for the nuclear warheads of the United Kingdom's Trident programme.

Loch Long is a body of water in the council area of Argyll and Bute, Scotland. The Sea Loch extends from the Firth of Clyde at its southwestern end. It measures approximately 20 miles in length, with a width of between one and two miles. The loch also has an arm, Loch Goil, on its western side.