• 4 1/2″ (115 mm) Ritchie CombiDial and Built-in Inclinometer
  • When mounting this Compass to a bulkhead that is NOT perpendicular (90? angle) to the center-line of the boat and/or NOT vertical (90? angle) to the waterline of the boat (boat on level keel), a fairing block MUST be used to make the compass so.