Ritchie Helmsman Combidial Compass - Flush Mount - Black. Featuring Ritchie's exclusive NiteVu night illumination system these Compasses created by Ritchie allow you to easily read your bearings in the dead of night. The Ritchie HF-743 Helmsman Compass System allows you to easily install the device in a matter of minutes allowing you to focus on your task without unnecessary delay. For powerful directiveforce magnets powerful lubber lines and a movable sun shield you're bound to love the Ritchie HF-743 Helmsman High Temperature Composite Construction Compass. Specifications for Ritchie HF-743 Helmsman Combidial Compass: Manufacturer: Ritchie Color: Black Features of Ritchie HF-743 Helmsman Combidial Compass 3-3/4" CombiDamp Dial Easily Installed Fits 4" (10.16cm) Mounting Hole (NOTE: Be sure you print the template Actual size) 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 Adapter Rings Available. Sold separately. 6" (15.24). Retrofits Existing Mounting Hole for Model No. HF-73 order H-ABLK. For Model No. HF-73W order H-AWHT 100percent Repairable Exclusive 5-Year Ritchie Warranty Approx. Shipping Weight: 2lbs (907g) Comes standard with 12V lighting. 24 & 32V lighting options are available. Some custom built OEM models may have different lighting. For all Helmsman built before 1992 please see the service manual page 5-14 or contact Ritchie for replacement lighting. Package Contents: Ritchie HF-743 Helmsman Combidial Compass Ritchie HF-743: HF-743 Helmsman Combidial Compass - Flush Mount - Black