Keep one of these on hand as an emergency steering compass. Affordably priced, it uses Ritchie¹s QuickSight system, which consists of a V shaped notch on the top of the compass for aligning it to the target, and a lubber line for reading it. It features a 2" diameter direct reading dial, sapphire and steel pivot movements, and built-in roller diaphragm for extended temperature operating range.It uses a tiny chemical lightstick for 18 hours of illumination. It includes a neck lanyard, and 3 lightsticks, and has a bright yellow protective silicone rubber case. It measures 1.4" high, and 2.6" in diameter for easy storage. SW 1 lb.