a fish processing vessel entered into service before 
January 1, 1988, and not more than 1,600 gross tons as measured under 
section 14502 of this title, or an alternate tonnage measured under 
section 14302 of this title as prescribed by the Secretary under 
section 14104 of this title or entered into service after 
December 31, 1987, and having not more than 16 individuals on board primarily employed in the preparation of fish or fish products.