Z-knife is totally what you're looking for. They cut through 2" webbing like butter, fishing line is no problem at all.
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Warren_L:I carry a pair of EMT shears also - seem to work great for cutting line. There are also line cutters as well that you can get, but I've not used them yet so I can't say how effective they are.
rapidiver:Yesterdays tragedy on Cape Cod ( http://www.scubaboard.com/showthread.php?t=117880 ) got me thinking
I've yet to find a knife/sheers/line cutter that will quickly slice through monofilament.
Does one exist?
In Florida Only....markDoerr:My only question about shears is using them in 3 - 7 mm gloved hands? How quickly can you use any shears like that?