Get a quick fix day or nightA compass made for sailing and watersports hold it in your hand, or tieit down to your kayak with special mounting harness. Compass featuresRitchie's QuickSight V-notch sighting system for easy heading alignmentand a lubber line for reading the compass. Small non-electric chemicallight sticks (3 included) provide 18 hours of lighting at night.Easy-to-read dial is 2" in diameter. International safety yellow,impact resistant case with neck lanyard. Puck style hand compass Sighting System: Arm's length Quicksight V-Notch & Lubber Line 2 9/16"dia x 1 3/8"H Illumination: Three small chemical lightsticks Warranty 5 years