Cammenga PRECISION LENSATIC Instructional Booklet page 5

6. Case Cover: Closes to protect the compass and reduce
carrying size. When opened wide (fig. 1), it can be used as a
straight edge or ruler. When perpendicular (fig. 2), the Sight
Wire (4) is used to set a course of movement.
7. Case: Contains and protects the Dial assembly.
8. Thumb-Loop: Locks the compass in the closed position.
When opened, it facilitates holding the compass to sight an
azimuth. (fig. 2).
9. Lanyard: A loop of braided nylon cord to secure the
compass around the neck and ease access to it when carried
in a shirt pocket.
10. Lens Bracket: When pushed all the way down it raises the
Dial off the pivot. When the compass is not being used, it is
important to raise the Dial in order to prevent damage to the
pivot (point on which the Dial balances).
11. Lens: High quality magnifier (about 2.5 inch focal length)
for reading the Dial when positioned about 30 degrees off
perpendicular. Handle carefully with clean tissue. Caution:
Close Lens Bracket against Bezel glass before closing case
cover.
12. Sight Groove: Used to set a course of movement over the
ground and to determine an azimuth when it is used along
with the Sight Wire (4), the Index Line (13), and the Dial (2).
13. Index Line: Black line etched on the crystal over the Dial.
Used to read an azimuth.
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