I have used a couple of Knives for sailing and two stand out. One is the Mariners knife (can't remember the manufacturer)--its blue and has a folding, locking serrated blade that's VERY sharp--even after 2 years. Also has a marlin spike, cat key, screwdriver and bottle opener to name a few--great multi-function knife. Only drawback is that you have to pull the blade out and it does not have a pair of plyers...The quality is great and only with occasional maintenance (spaying WD 40 on it) I have yet to have any rust show up. Available at West Marine--probably other places too).
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<br>The other is the the SOG Clip knife---cant remember the model exactly but it comes in various sizes, is easy to open, and has an adjustable clip that allows you to clip it to almost anything or simply put it in a sheath or pocket on your PFD. Only has a VERY sharp, folding, serrated blade and locks in the open position. Has a open groove in the top for pulling the blade but and works great for loosening Bell Shackles.
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<br>I Tried one of the murray's dive style knives that have a plastic sheath--yellow handle....(no ill will meant towards murrays) but I found that the knife rusts too quickly and the serrated blade is far too dull or short to cut anything. In fact I cut myself twice trying to go through a 5/16" piece of Marlow braid--its also difficult to connect to your harness or PFD without it getting in the way of anything.
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<br>Don S.<br><br>