The fledgling, nicknamed Steve, was discovered aboard Plymouth-based HMS Ocean and taken care of by the ship's company, who fed it by hand until bringing it to shore at Southampton, Hampshire.
The bird was then handed over to the RSPCA and is being cared for at the Stubbington Ark Animal Shelter in Fareham, before continuing its rehabilitation at the West Hatch Wildlife Centre in Taunton, Somerset.
RSPCA inspector Tina Ward said: "This was certainly one of the most unusual places we've collected a bird from.
"The crew and the captain went above and beyond to care for this young bird who wouldn't have survived without their help. We can't thank them enough for their efforts.
"The future looks good for Steve. He just needs to build his strength to get ready for the wild and he can do that in our specialist aviaries now that he's eating for himself."
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