Ritchie Explorer Compass - Bulkhead Mount - White Dial. This Compass from Ritchie was expertly built to be the ultimate in navigation device technology. With a 2-3/4" easy to read direct reading dial the Ritchie Explorer Compass Device provides you with a scientifically matched Sapphire jewel and hardened steel pivot dial movement. For a great way to make sure you are always aware of where you're going choose the Ritchie Explorer V537W Compass. Specifications for Ritchie V-537W Explorer Compass: Manufacturer: Ritchie Color: White Features of Ritchie V-537W 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-537W Explorer Compass Ritchie V-537W: V-537W Explorer Compass - Bulkhead Mount - White Dial