2" Diameter Metal Case Military Marching Lensatic Compass(Golden)
Features:
Liquid filled for fast readability with sturdy metal case
Floating luminous dial
Adjustable luminous marching line
Thumb hold and magnifying viewer
Sighting hairline
Ideal for locating positions on a map or in the field
Dimension: 2 inch (Diameter), 0.9 inch (Height)
Instructions for Lensatic compass
To take a fix: Using the compass hairline, sight on a prominent landmark or feature shown on a map. Read the magnetic bearing from the front of the compass dial For example, assume you are sighting on a lighthouse and the bearing to the lighthouse in 40, Now place the compass on the map so that lighthouse is on wire-line and Ns is parallel to the magnetic north line on the map. Your location is on the dotted line.