jgoodstein
Contributor
I neglected to include in my post that I tested the compass before I mounted the sheath. It appears not to be affected by the knife, even when I touch the knife to the compass housing.
the magnetic field that your knife gives off even above water is probably no match for a compass in a console ( meaning has no effect) but even less so underwater where the magnetic field is weakened even more by the particles that surround it.