Ritchie Explorer Compass - Bulkhead Mount - Blue Dial. Ritchie built these Compasses with high temperature composite construction to withstand the heat of the sun or cold of the earth and these Ritchie V-537B Ritchie Explorer Compass w/ Illuminated Viewing Dial have powerful directiveforce magnets that provide a strong magnetic attraction to quickly lock on to your desired heading. This Ritchie V-537B Ritchie Explorer Compass V537B has precisely-matched sapphire jewels and a hardened steel pivot to ensure precise readings with every use. Plus these compasses are 100percent repairable if you ever need to replace them. Make headings easier with the powerful magnets and Ritchie Magnets in the Ritchie V-537B Explorer 30 Degree Compass. Specifications for Ritchie V-537B Explorer Compass: Manufacturer: Ritchie Color: Blue Features of Ritchie V-537B 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-537B Explorer Compass Ritchie V-537B: V-537B Explorer Compass - Bulkhead Mount - Blue Dial