Ritchie Explorer Compass - Bulkhead Mount - Black Dial. Ritchie built these Compasses with a 2-3/4in easy-to-read direct reading dial and viewing angles adjustable to 30 degrees to bring you the most precise readings possible. This Ritchie V-537 Explorer Compass also has 12V night illumination and built-in compensators that easily adjust for deviation. If the viewing gets a little fuzzy just use the directional index to help you out. For a scientifically matched sapphire jewel and hardened steel pivot/weight a powerful directiveforce magnet and high temperature composite construction these compasses will serve you well. If you're seeking an incredibly precise directional reading device that will guide you on your adventure purchase this Ritchie V-537 Explorer Compass Device. Specifications for Ritchie V-537 Explorer Compass: Manufacturer: Ritchie Color: Black Features of Ritchie V-537 Explorer Compass 2-3/4" Easy to Read Direct Reading Dial Viewing is adjustable to 30 Degrees 12V Night Illumination Built-in Compensators to Easily Adjust for Deviation Easily Installed Fits 3" (7.62cm) Mounting Hole Scientifically Matched Sapphire Jewel & Hardened Steel Pivot Dial Movement Powerful DirectiveForce Magnets for Fast Heading Lock-on High Temperature Composite Construction for Extended Operating Range 100percent Repairable Exclusive 5-Year Ritchie Warranty Comes standard with 12V lighting. 24V lighting option is available. Some custom built OEM models may have different lighting. Contact Ritchie for replacement lighting. Package Contents: Ritchie V-537 Explorer Compass Ritchie V-537: V-537 Explorer Compass - Bulkhead Mount - Black Dial