You have run your boat aground on a desert island. However, the U.S. Navy used to have a base on the island, and they have left various items behind which you must use to find the fuel to get back home.
Notes
The ZX Spectrum version was published by the author as early as 1985. It made an appearance on the four-game H&D Adventure Compilation in 1986, and was re-released several times including by GI Games & Zenobi Software.