Thank you for your help. I didn't find him on this list - is there anything like this for previous years?
I thought I had found Thomas Corrin on a vessel in 1871 but when I looked again .. the person came from Ireland, rather than IOM.
I guess he is somewhere in the world as on the 1871 Census his wife Helen Eliza says she is Mariners Wife.
Thankyou for your useful link