Explorer Compass. Explorer Compass Features:. 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. 100% Repairable. Exclusive 5-Year Ritchie Warranty. Notes:. Comes standard with 12V lighting. 24V lighting option is available.. Some custom built OEM models may have different lighting. Contact Ritchie for replacement lighting.