Surface Mount Compass XP-98W Tactician Features: 3" CombiDial with Tactical Quadrants show Wind Shifts and Headers. CourseMinder™ Moveable Bezel & Heading Indicator Locks-In Rhumb or Lay Lines. Forward Lubber Line to Steer Magnetic Courses. Compact 4 1/4" Base Diameter. Low 2 3/4" Mounted Height. Easy to Install, mounting template provided. 25 Degree Heel Angle. Twist On/Off for Easy Removal. High-Visibility Blue 3" dial with Extra Large Numerals. 45 Degree Lubber Lines. 100% Repairable. Exclusive 5-Year Ritchie Warranty.