Flashcards in M2 Aiming Circle Deck (24)
What is the purpose of the M2 aiming circle?
Measures angular values with respect to preselected baseline
Accuracy of Aiming circle?
What controls the elevation and depression movement?
The elevation micrometer
What controls azimuth measurement on aiming circle?
Azimuth micrometer knob
What allows rapid azimuth measurement on aiming circle?
Azimuth micrometer worm
Describe telescope on aiming circle?
What distance should you be from high-tension power lines and electronic equipment when using aiming circle?
Distance from railroad tracks and tanks/trucks when using aiming circle?
Distance from vehicles when using aiming circle?
Distance from barbed wire when using aiming circle?
Distance from mortars/telegraph wire when using aiming circle?
What is the dec constant for Ft Bragg?
Define declination constant
Clockwise angle between grid N and magnetic N
Purpose of declination stations
To determine dec constants of instruments and to correct for local attractions, annual variations, and instrument errors.
What are the criteria for choosing a site for a declination station?
Must have a view of at least 2 well defined points with a known grid azimuth
What are the 4 rules for when the aiming circle should be declinated?
1. When it is moved 25 miles or more from the area in which it was last declinated
2. After an electrical storm or severe shock
3. Every 30 days
4. When it is first received or returned from support maintenance repair
Weight of M2/M2A2 aiming circles without equipment?
Weight of M2/M2A2 with equipment?
Azimuth rotation of both aiming circle models?
Max elevation of M2 aiming circle?
Max elevation of M2A2 aiming circle?
Max depression of both aiming circle models?
Magnification of both aiming circle models?