Precise pocket compass with fast rare earth magnet and sapphire jewel bearing * 0-to-90-degree quad scales; 2 long-level bubbles on outside of housing * Hinge inclinometer saves time by taking simultaneous trend and plunge measurements * Azimuth and vertical angle (+/- 90 percent) readings are accurate to +/- 1/2 degree * This item is not for sale in Catalina Island