Description
The design of the SR4 magnetic compass revolutionised the way the magnetic compass was produced with the body created out of a polycarbonate compound which has two main benefits.
First, it does not have the leaking problems that traditional brass compasses suffer. Any leak in a magnetic compass can cause air bubbles to form on top of the compass, leading to problems in reading the heading accurately. The production methods and materials used in the John Lilley and Gillie SR4 compass completely resolve this problem.
Secondly, almost all of the unit is transparent, which allows more light to reach the compass card improving visibility.