The only "Bold Carter" I know of is an alternative title for  Polly On The Shore;  The text in the DT is credited as "copyright Randy Newman", which is a little puzzling unless he is nearly three hundred years old.  Perhaps it was he who added the lines about being on a Privateer, though I rather doubt it (I don't think that they are traditional, either, though I could be wrong).  The song was first published, apparantly, as "The Valiant Sailor" in 1744, so this, and the fact that the hero dies in battle rather than by shipwreck, would seem to rule it out as the song you want.  Do you know if your "Bold Carter" is an old or a modern song, and are you able to quote any of it for us?

Malcolm