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: <0.06mm.Deviation between sight seam centre-line and sight mark line: <0.5mm.Note: Azimuth circle will freely rotate on compass & should not produce a side motion error of more than 2 degrees.Product weight: 1.5kg.
