Another recording can be found by Bob Walser's 'When Our Ship Comes Home'.

The words he uses are pretty close to the 'correct version' which Ted has posted, though he leaves out the Bombay verse. The main difference is in vs 2 where he sings "'cross oceans and seas calm and wild"

Ted, I'd be interested to know whether Bob's tune is the same as your dad's or whether he's changed it too.

I gather your dad wrote it based on your grandfather's stories of his time in the British merchant service - so a real family connection.