Machined from 6061 billet aluminum with anodized protective finish
Specific durometer O-ring dampens noise/vibration and secures nut
Wider contact area for a more stable Prop
Cooling ports aid in heat dissipation
Eliminator nut helps dampen trolling motor Prop noise and vibrations; designed to fit minnkota 80,101 and 112 series trolling motors
Mark 3 Marine SextantSometimes referred to as a "lifeboat" sextant, the Mark 3 is an inexpensive training sextant. Yet this model has taken sailors around the world, too! It is full-sized and has sunshades, but no optical magnification to help you find dim celestial bodies.Comes with instruction booklet. Owner's Manual (pdf)