SuperSport CompassDeveloped for and tested on offshore race boats the SuperSport Series compasses feature the PowerDamp; Plus dial. This dial technology features the PowerDamp? dial skirt to prevent oscillation, larger DirectiveForce™ magnets for quick lock on and extra-large steel pivots and jewels for smooth fast action.Features3-3/4" PowerDamp Plus, High-Visibility Blue Dial with Extra Large White NumeralsEasily Installed, Fits 4" (10.16 cm) Mounting Hole Built-in Compensators to Easily Adjust for DeviationScientifically Matched Sapphire Jewel & Hardened Steel Pivot Dial MovementInternal Gimbal Systems for Maximum Stability During Adverse Pitch and Roll ConditionsPowerful DirectiveForce Magnets for Fast Heading Lock-onExclusive Built-in Green NiteVu Night Illumination in Movable Sun Shields45 Degree Lubber LinesHigh Temperature Construction for Extended Operating RangeCustom Fitted Protective Covers100% RepairableExclusive 5-Year Ritchie Warranty