The name Terry Chapman rings a bell,but again ,Idon't know where from.
Probably after your time but John Prescott used to collect the Political Levy (1shilling) outside the union office in Posterngate.
I have a few photos of some of the old Hull lads from those days but I can't put names to them all.
One ship, the "Riley", another tramp for a long trip, I was the oldest deckhand at 21.That was about 1953/54. A hell of a good trip though.
I should say except for the Bosun, I think his name was Bill Sampson.
All the best