An old salt is a term used to describe an experienced sailor or mariner. The crossword solutions for this term are TAR (3 letters), SEAFARER (8 letters), WATERDOG (8 letters), GOB (3 letters), and SEADOG (6 letters). TAR is a slang term for a sailor, SEAFARER is someone who travels by sea, WATERDOG is a sailor who spends a lot of time on the water, GOB is another slang term for a sailor, and SEADOG is a sailor with a lot of experience.