Ritchie S-53G Explorer Compass - Surface Mount - Gray [S-53G] Brand_Blue Sea Systems 1 degree horizontal beamwidth means

1 degree horizontal beamwidth means it can pick out weaker targets further off in the distance than wider beamwidths

the rudder position from zero through fifty degrees to either port or starboard

Colored for easy mixing

and battery set-up

Ritchie S-53G Explorer Compass - Surface Mount - Gray [S-53G] Brand_Blue Sea Systems 1 degree horizontal beamwidth meansExplorer Compass Features: 2 3 4 (70 mm) Easy to Read Direct Reading Dial Compact Low Profile Design Quick Push Button Removal of Compass Module for Storage and Security Choice of Colors 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