MAP READING & LAND NAVIGATION Flashcards
What is the field manual for map reading and land navigation
TC3- 25.26
What are the basic colors of a map
Black man-made features
Red -Brown -combined a combination of red and brown on red-light readable maps
Blue- Water
Green- vegetation
brown-relief features
red -cultural features
What are military symbols?
Features used to represent types of military organizations installations and activities
Where is a legion on a map found
lower left margin
What are contour lines?
Imagine lines on the ground connecting equal elevation they represent high and low ground elevation
What are the three types of contour lines?
Index
supplementary
intermediate
How many miles are in one degree
17.7 miles
How many norths are there on a map, and where are they
true N
magnetic N
and grid N
What must be done on the map before it can be used
Orientated to north
Five-digit terrain features
Hill, Valley,Saddle, Ridge, depression
The spread what are 2 supplementary terrain features
cut, fill
What are three minor terrain features
Draw, spur, Clift
What is a map
A geographical representation of a position on the Earth’s surface drawn to scale as seen from above
What is in Azimuth
A horizontal angle measured in a clockwise manner from the north baseline expressed in direction
What is the distance between one grid line of a combat map?
One kilometer or 1000 meters
What is a contour interval
The vertical distance between adjacent contour lines on a map
How many miles are in a circle
6400 miles
Which north is used on a military map
Magnetic N wind using a compass and grid N when using the map
What are two methods of holding a compass
Compass to cheek and center hold
What is a back azimuth
180 degrees plus or minus
What is a directional angle
the angler representation between magnetic N grid N and true north
What is a general rule for reading military grade coordinates
Right and up
Name two ways to orientate a map
Terrain Association and compass
What does intersection mean
Finding and locating of an unknown point by siding two or more known points
What does restriction mean
Locating a point on the map using two well-defined locations that can be pinpointed on a map
How close will a ten-digital grid get you to your point
1 meter
How close will a six-digit grid get due to your point
100 meters
How close will an eight-digit grid get you to your point
10 meters
How close will a four-digit grid get you to your point
1000 meters
How do you convert a grid azimuth to a magnetic azimuth
Subtract the grid magnetic angle from the grid azimuth
