Ritchie B-81-WM Voyager Bracket Mount Compass - Wheelmark Approved f/Lifeboat & Rescue Boat UseThe Wheelmark approval is for Lifeboat and Rescue boat compasses. These compasses are also suitable for sailboats, power boats and motor sailing vessels.Features:Wheelmark Certification3" CombiDamp Dial12V Green LED LightingAdjustable and Removable with Bracket and ThumbscrewsBuilt-in Compensators to Easily Adjust for DeviationScientifically Matched Sapphire Jewel and Hardened Steel Pivot Dial MovementPowerful DirectiveForce Magnets for Fast Heading Lock-onMovable Sun ShieldHigh Temperature Composite Construction for Extended Operating Range100% RepairableExclusive 5-Year Ritchie WarrantyThe 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.