Kirby Morgan 510-787 Port Whisker Wing SpiraKut The wavy pattern cut from

The wavy pattern cut from the top of the blade (created by a fireman from Sweden) and along the inside of the handle let you place a piece of rope (between the half-open blade and handle) and scissor the blade shut- especially convenient for cutting rope in-and-around flesh without having to fully open/expose the knife's blade

Spyderco's Rescue knives are long favored by seafarers and the design has since been embraced by commercial divers

Kirby Morgan 525-376 SL-17A/B and SL-17C Anode Kit

At the time of this writing

Kirby Morgan 510-787 Port Whisker Wing SpiraKut The wavy pattern cut fromKirby Morgan 510 787 Port Whisker Wing