Jackie what dates was he on that ship?
Article about it's captain here.
StefanBatoryOceanLiner
photo here of the ship.
Image:Polish destroyer Slazak.jpg - Wikimedia Commons
Which was originally HMS Bedale. It was commissioned to the Polish Navy in April '42.
ORP ÅšlÄ…zak - Wikipedia, the free encyclopedia
There was a Polish destroyer of that name built 1936 but different ship entirely.
Torpedowce polskie