Hi Greg:
<br>I have both a sailors knife and a safety knife with serrated blade. I believe that the safety knife will do the trick but do not take this for granted.
<br>Mostly I think you should worry about not getting entangled with the sheets or rope extension of yr trapeze line (if you have an adjuster) or if you capsize and get trapped under the tramp. You can probably get a safety knife a any hardware store or at any marine goods supplier.
<br>
<br>Good luck
<br>
<br>Rafael<br><br>