That's good to see. People willing to get off their butt and go out of their way to do a little research which they consider to be important to them, not sit there whingeing it should be available on the Internet as a matter of right.
You may also wish to look at this link which is I think his Seaman's "Pouch".
http://discovery.nationalarchives.gov.uk/details/r/C8219975If it is him make a note of his Discharge A number.R277264 This number is unique to him.
These pouches in BT 372, contain all documents submitted by seamen to the Registry of
Shipping throughout their career, often including photographs, together with copies of documents
issued to them, and are to be found at the National Archives,.
Good luck with your research.