Ritchie B-51W Explorer Compass - Bracket Mount - White [B-51W] Electrical | Circuit Breakers Frequency Response - 80HZ -

Frequency Response - 80HZ - 20KHZ

Operating frequency of 200 and 50 kHz

DC Ground: no (will read open-circuit with ohmeter test)

permanent magnet motor

Ritchie B-51W Explorer Compass - Bracket Mount - White [B-51W] Electrical | Circuit Breakers Frequency Response - 80HZ -Explorer Compass Features: 2 3 4 (70 mm) Easy to Read Direct Reading Dial Adjustable and Removable with Bracket and Thumbscrews Internal Green Night Illumination Built in Compensators to Easily Adjust for Deviation Scientifically Matched Sapphire Jewel & Hardened Steel Pivot Dial Movement Powerful DirectiveForce Magnets for Fast Heading Lock on Movable Sun Shield High Temperature Composite Construction for Extended Operating Range 100% Repairable