When Plymouth and Portsmouth's football teams face each other in the FA Cup on Saturday they will not be the only ones representing the proud naval cities.
Argyle's players and the crew of HMS Albion are hoping for a double celebration
Teams from both Royal Navy dockyards will also go head-to-head in a football game.
HMS Albion will be representing Plymouth against a Portsmouth-based side from HMS Ark Royal.
And the match at the Royal Navy's air base in Yeovil will have all the passion of an FA Cup tie.
Players from Argyle went aboard HMS Albion on Tuesday to meet the men and hand down some pointers for their big game, as well as taking part in a kick about on deck.
HMS Albion's crew train for their version of the "Dockyard Derby"
Among those going aboard was midfielder Lilian Nalis who felt his side have a good chance at Fratton Park, if they play with confidence.
"No team's unbeatable and that's why football is such a great game. If you don't believe then you're never going to make it so we have to believe that we can go there and get a result," he said.