All at Sea (1957) aka "Barnacle Bill"
A seasick sea captain commands an amusement pier despite local opposition.
Alec Guinness, Harry Locke, Frederick Piper
Captain Ambrose comes from a long line of distinguished sailors...but
is all too susceptible to seasickness. After the war, he buys himself
a nautical command on shore; a decrepit amusement pier at the British
resort town Sandcastle-on-Sea, whose prim town council has outlawed
arcade games as a form of gambling! Running the pier like a naval
vessel, the captain's determination to make it a modern, going concern
meets steady opposition. But with an unexpected new ally, he pursues a
remarkable scheme to liberate his "ship" from land authorities...