Ritchie S-53 Explorer Compass - Surface Mount - Black [S-53] Wichard Halyard Shackles Jammers is manually engaged onto

Jammers is manually engaged onto the line

E - 1 1/4 in

Base Diameter "B" - 180 mm (7 1/16")

D - 20 7/8" (530mm)

On larger boats they are used for fine-tune mainsheet tackles

Ritchie S-53 Explorer Compass - Surface Mount - Black [S-53] Wichard Halyard Shackles Jammers is manually engaged ontoExplorer 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