Ritchie B-81-WM Voyager Bracket Mount Compass Wheelmark Approved f/Lifeboat Rescue Boat Use. The Wheelmark approval is for Lifeboat and Rescue boat compasses. These compasses are also suitable for sailboats, power boats and motor sailing vessels. Features Wheelmark Certification. 3 CombiDamp Dial. 12V Green LED Lighting. Adjustable and Removable with Bracket and Thumbscrews. Built-in Compensators to Easily Adjust for Deviation. Scientifically Matched Sapphire Jewel and Hardened Steel Pivot Dial Movement. Powerful DirectiveForce Magnets for Fast Heading Lock-on. Movable Sun Shield. High Temperature Composite Construction for Extended Operating Range. 100% Repairable. Exclusive 5-Year Ritchie Warranty. The WM suffix signifies type approval and compliance with the Navigation requirements of Marine Equipment Directive MED 95/98/EC and the last modification by Directive 2011/75/EU. The Wheelmark approval is for Lifeboat and Rescue boat compasses. These compasses are also suitable Wheelmark Certification. 3 CombiDamp Dial 12V Green LED Lighting. Adjustable and Removable with Bracket and Thumbscrews Built-in Compensators to Easily Adjust for Deviation. Scientifically Matched Sapphire Jewel and Hard Powerful DirectiveForce Magnets for Fast Heading Lock-on Movable Sun Shield High Temperature Composi