Provide the ultimate in high-speed performance, accuracy and dependability whether you"re on the race course or offshore fishing. High visibility Blue dials with extra large white numerals. Built-in compensators to easily adjust for deviation. Scientifically matched sapphire jewel and hardened steel pivot dial movement. Internal gimbal systems for maximum stability during adverse pitch and roll conditions. DirectiveForce magnets for fast heading lock-on. Exclusive built-in green NiteVu night illumination in movable sun shields on SS1000 & 2000 models. Fixed low level green NiteVu night illumination on SS5000. Exclusive 5 year warranty.