Originally Posted by raftus
Re: river knives - there are two simple things to do so that your will probably not lose your knife.
1. Use a short piece of bungee/shock cord - like they sell a REI, 3/16" or so, tie from the lanyard hole in the knifes handle with a loop at the top to go over the sheath. If you wrap this halfway around the knife as you go it is very secure and can easily be removed with one or two fingers.
2. Take a piece of multi braid string or accessory cord - also from REI or a similar place, and tie your sheath with a taunt line to a shoulder strap, side strap or other nearby secure place on your jacket.
This has worked for me for the last 10 seasons with the same knife.
When we took Nick Wigston's/Mike Mather's SWR course (which was excellent - I highly recommended it), Mike suggested using a thick rubberband to hold a knife as suggested above in #1. Using a rubberband holds the knife in, but is easy
to break when you need the knife. It's worked for us so far. However, we also use Bearclaw knives and they seem to stay in the sheath.