Features large 3 3/4" dial, built in illumination, built in compensators, movable sun shield and 5 year warranty.

Helmsman Compass Features
3 3/4" CombiDamp Dial or 3 3/4" Open Read Dial (as specified in the item selection)
Exclusive Built-in Green NiteVu Night Illumination
Built-in Compensators to Easily Adjust for Deviation
Scientifically Matched Sapphire Jewel and Hardened Steel Pivot Dial Movement
Powerful DirectiveForce Magnets for Fast Heading Lock-on
Movable Sun Shield
45 Degree Lubber lines
High Temperature Composite Construction for Extended Operating Range
Custom Fitted Protective Covers Available
100% Repairable
Exclusive 5-Year Ritchie Warranty