ApplicationThis waterproof digital compass is suitable for cars, ships, boats, caravans and trucks. The built-in precision compensator makes it easy to adjust the deviation for more accurate measurements. It is an adjustable magnetic declination compass for utility vehicles. High QualityThe marine digital compass is made of ABS. The compass is waterproof and corrosion resistant, making it ideal for use on ships or watercraft. Sensitive Response The magnetic declination adjustment pad has a fast response speed, a high sensitivity and is individually balanced. Accuracy readings are displayed. Portable The compact size is only 8 x 7.2cm and the bottom diameter is 6cm. This compass is very portable and easy to install or use. Easy to InstallNavigation bracket mounting compass is a vertical compass that can be mounted on the deck to get the right angle of view. compass view for direction checking.