Ritchie Voyager Bracket Mount Compass - Wheelmark Approved f/Lifeboat & Rescue Boat Use. These compasses are also suitable for sailboats power boats and motor sailing vessels. Specifications for Ritchie B-81-WM Voyager Bracket Mount Compass: Manufacturer: Ritchie Color: Black Features of Ritchie B-81-WM Voyager Bracket Mount Compass 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 100percent 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. Package Contents: Ritchie B-81-WM Voyager Bracket Mount Compass Ritchie B-81-WM: B-81-WM Voyager Bracket Mount Compass - Wheelmark Approved f/Lifeboat & Rescue Boat Use