Check the listing for details. Azimuth Compass Circle Ring Sighting Maritime Ship Boat Sailing Nautical Tool. Condition: Brand New. Listed at 789.70 USD. Item AZIMUTH - COMPASS CIRLCE This professional azimuth circle is constructed to leading industry standards.Our azimuth ring is designed to be used with any class (A) compass for sighting accurate bearings of distant objects, and finding the azimuth of celestial bodies visually, thus determining the ships position to these positions for safe navigation.The main ring body is constructed of quality non-magnetic material and will not interfere with a compass magnetic field.This is a professional navigation tool constructed to the highest quality with deviations and errors refined to an absolute minimum.Key Features:High quality professional instrument.Non-magnetic material construction.Minimum deviation guaranteed (see figures below).Certified to industry standards.Designed to be used in conjunction with any high grade ship magnetic compass.Azimuth Circle Specifications:Model: GFC-165 Azimuth circle.Use: Designed for use in conjunction with a class (A) magnetic compass (such as a CPT-165A magnetic navigation compass).Standard: Manufactured in accordance with shipbuilding GB/T 335-2005 standards.Outer / inner diameter: 239mm; 226mm.Material: High quality non-magnetic material.Deviation between prism box sight-line and zero graduation line: