One of the best folding knives for boat and salt water use is the Spyderco Salt 2 series of knives. The blade is made of non-rusting H1 nitrogen based steel, all other metal parts are stainless. The handle is based on the Delica series, with high grip texturing . The locking system is a back lock. There is a 4 position pocket clip, and a lanyard hole.Here are a couple of technical spec’s-

Total open length - 7.25”

Closed length - 4.25”

Blade length - 3.00”

Steel- H-1

Weight - 2.1 oz.

More info at the Spyderco web site

Price is $123.00 for the serrated edge, $135.00 for the plain edge. Please add $7.00 shipping at check out.

Just in- a Salt2 with plain edge. Price has gone up a bit.