I bet the Captain of Chatham is really chuffed that the whole 1st episode centred on a fat gunner who had achieved one promotion in 25 years!!
There's something about gunners. We had a gunner in HMS Sabre who hadn't even been promoted once in his 20 odd years. May have had something to do with spending much of his time in the Yacht, and so refusing promotion. He was just as much of a character as the guy starring in Shipmates.