PARTS OF A LENSATIC COMPASS Movable brass ring (bezel ring) Front sight Rear sight; eyepiece lens Cover Dial with scale Holding ring Luminous line with reading lens.
Download ReportTranscript PARTS OF A LENSATIC COMPASS Movable brass ring (bezel ring) Front sight Rear sight; eyepiece lens Cover Dial with scale Holding ring Luminous line with reading lens.
Slide 1
PARTS OF A LENSATIC COMPASS
Movable brass ring (bezel ring)
Front sight
Rear sight;
eyepiece lens
Cover
Dial with scale
Holding ring
Luminous line with
reading lens
Slide 2
USE OF A LENSATIC COMPASS TO DETERMINE BEARING ON A MAP
STEP 1: Open out the compass and lay it on a flat table with the map (in this case a
diagrammatic map is provided; note that the North is indicated by a small bar while the
desired bearing is indicated by a line)
North indicator
Desired
bearing
Slide 3
USE OF A LENSATIC COMPASS TO DETERMINE BEARING ON A MAP
STEP 2: Place the compass on the map such that the desired bearing is running through its
middle. Rotate the map while holding the compass in place such that the North indicator
and the compass North is aligned. In the example below, the map was rotated
counterclockwise.
North indicator o f the map
aligned with compass North
Desired bearing
running through
middle of the
compass
Slide 4
USE OF A LENSATIC COMPASS TO DETERMINE BEARING ON A MAP
STEP 3: Rotate the bezel ring unti the luminous line is aligned with the desired bearing.
Bezel ring rotated clockwise
Luminous line
aligned to desired
reading
Slide 5
USE OF A LENSATIC COMPASS TO DETERMINE BEARING ON A MAP
STEP 4: Read compass bearing through reading lens. In this example, it is 234o. The concept of
minutes and seconds is beyond our scope.
Use reading lens to get
compass reading
PARTS OF A LENSATIC COMPASS
Movable brass ring (bezel ring)
Front sight
Rear sight;
eyepiece lens
Cover
Dial with scale
Holding ring
Luminous line with
reading lens
Slide 2
USE OF A LENSATIC COMPASS TO DETERMINE BEARING ON A MAP
STEP 1: Open out the compass and lay it on a flat table with the map (in this case a
diagrammatic map is provided; note that the North is indicated by a small bar while the
desired bearing is indicated by a line)
North indicator
Desired
bearing
Slide 3
USE OF A LENSATIC COMPASS TO DETERMINE BEARING ON A MAP
STEP 2: Place the compass on the map such that the desired bearing is running through its
middle. Rotate the map while holding the compass in place such that the North indicator
and the compass North is aligned. In the example below, the map was rotated
counterclockwise.
North indicator o f the map
aligned with compass North
Desired bearing
running through
middle of the
compass
Slide 4
USE OF A LENSATIC COMPASS TO DETERMINE BEARING ON A MAP
STEP 3: Rotate the bezel ring unti the luminous line is aligned with the desired bearing.
Bezel ring rotated clockwise
Luminous line
aligned to desired
reading
Slide 5
USE OF A LENSATIC COMPASS TO DETERMINE BEARING ON A MAP
STEP 4: Read compass bearing through reading lens. In this example, it is 234o. The concept of
minutes and seconds is beyond our scope.
Use reading lens to get
compass reading