TC 3-25.26 🌏 Flashcards
What covers Land Navigation?
TC 3-25.26
What is the definition of a map?
a graphic representation of a portion of the earth’s surface drawn to scale, as seen from above
Who is responsible for securing maps for the whole unit?
S2
What are the 3 map sizes?
- Small
- Medium
- Large
What are the Colors of a Military Map?
- Red
- Red-Brown
- Blue
- Green
- Brown
- Black
What does UTM stand for?
Universal Transverse Mercator Grid
What are the 3 types of north?
- True (North Pole)
- Magnetic (Compass)
- Grid (Map)
What is the rule of thumb for reading a map?
Right and Up
How many grid zones is the world divided into?
60
How close will an eight digit grid get you?
Within 10 M
How close will a six digit grid get you?
Within 100 M
How close will a ten digit grid get you?
Within 1 M
What is an Azimuth?
An azimuth is defined as a horizontal angle measured clockwise from a north base line; the azimuth is the most common military method to express direction
What is a Back Azimuth?
A back azimuth is the opposite direction of an azimuth
What is the Grid-Magnetic Angle?
The G-M angle value is the angular size that exists between grid north and magnetic north
What is Intersection?
Intersection is the location of an unknown point by successively occupying at least two known positions on the ground and then map sighting on the unknown location
What is a modified resection?
Locating ones position on a map when the person is located on a linear feature on the ground, such as a road
What is a resection?
Locating ones position on a map by determining the grid azimuth to at least two well defined locations that can be pinpointed on a map
How do you determine your pace count?
Counting how many paces it takes you to get to 100M
How big is a grid square on a large map?
1Km by 1Km
What is a longitude line?
A line on the map traveling East to West
What is a latitude line?
A line on the map traveling North to South
What are the ways to determine your location on a map?
Resection, Modified Resection, and Intersection
- remember the acronym RIM*
What are the three major parts of the Lensatic Compass?
- Cover
- Base
- Lens
What are the two techniques for using the Lensatic Compass?
- Center hold technique
- Compass-to-cheek technique
What are the different types of contour lines?
-Index
-Intermediate
-Supplementary
What are the Five Major Terrain Features?
-Hill
-Valley
-Ridge
-Saddle
-Depression
* REMEMBER hidden valley ranch salad dressing *
What are the Three Minor Terrain Features?
-Draw
-Cliff
-Spur
What are the two supplementary terrain features?
-Cut
-Fill
What is Map Orientation?
The first step to land navigation; when the north south on the map aligns with the north south on the ground
What are the Three Land Navigation Methods?
- Dead reckoning
- Moving by terrain association
- Combination of techniques
What does OCOKA stand for?
O- Observation and Fields of fire
C- Cover and Concealment
K- Key terrain
A- Avenues of Approach
How many degrees are in a compass?
360
How many Mils are in a compass?
6400
How many Mils are in one degree?
17.7
Where is the legend
located?
Lower Left
Covers Graphic symbols
What is the Graphic Scale Ruler?
Map to ground distance
What are the 4 ways to get distance?
Pace
Odometer
Substance
Submit Range
What is Zulu time based off of?
Prime meridian
