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COA #53 > Basic Land Navigation (Map & Compass) (WEEK 5) > Flashcards

Basic Land Navigation (Map & Compass) (WEEK 5) Flashcards

1
Q

A scale on the bottom of the map that is labeled 1:24,000 is known as the _______?

A

Representative Fraction

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2
Q

If you shot an azimuth of 120* degrees and you declination for that area is 16* degrees, what would your new azimuth be in relation to the map?

A

136* degrees

120* + 16* = 136*

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3
Q

A scale on the bottom of the map that shows distance is represented in a ________ is known as the _______ (RF)

A

Fraction, Representative Fraction

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4
Q

Contour intervals measure _________ between contour lines.

A

Elevation

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5
Q

_________ intervals are father apart at the top and closer together at the bottom.
A) Concave
B) Convex

A

Convex

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6
Q

For the Magnetic Declination correction you need to go from _______ to _______.

A

Magnetic North , True North

Add declination when moving from compass to map

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7
Q

If you shoot an azimuth of 185* what is your back azimuth?

A

5* degrees (185* - 180*= x ) **You subtract declination when moving from map to compass*

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8
Q

USGS maps are oriented with _________ at the top..

A

True North

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9
Q

A _________ is also known as a topographical map.

A

7.5 Minute quadrangle map

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10
Q

Imaginary lines called ________ and _________ meet at a point called Initial Points.

A

Baselines , Principle Meridians

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11
Q

To determine the percentage of a slope you divide the ________ by the _________ and then multiply by 100.

A

Vertical, Horizontal

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12
Q

What does this symbol represent on a map.

A

Un-improved Road

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13
Q

Know what a Quarry or Open mine symbol looks like.

A

It is two crossed picks

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14
Q

**How many initial points are in California and what are their names?***

A

3, Humbolt base and meridian, Mt. Diablo base and meridian, San Bernardino base and meridian

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15
Q

What is the slope formula?

A

Rise over Run X 100

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16
Q

How is slope expressed?

A

In Percent

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17
Q

How many steps are in a pace?

A

TWO

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18
Q

What is the normal pace length /Stride?

A

5 feet

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19
Q

List the parts of a compass?

A

Magnetic needle, Revolving 360^ dial, Base Plate Mirror, Orienting lines, Sites

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20
Q

How do you hold a compass?

A

Flat and level

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21
Q

What is the azimuth adjustment for a compass in California?

A

14 to 20 degrees in California

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22
Q

How do you get a back Azimuth?

A

Add 180 degrees

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23
Q

How many feet / chains are in one mile?

A

5,280 feet or 80 chains

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24
Q

How many feet in a yard?

A

THREE

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25
Q

How many feet are in an acre?

A

208 X 208 = 43,560

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26
Q

How many feet are in a chain?

A

66 feet

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27
Q

How many chains in an acre?

A

10 Square chains

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28
Q

One square mile / one section equal?

A

640 acres

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29
Q

How many acres in a section?

A

640 Acres in a section

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30
Q

What is an intersection?

A

A point on a map intersecting two known landmarks

31
Q

What is resection?

A

Finding ones location by sighting two known landmarks

32
Q

On a topo map how are ridges shown?

A

U shaped, maybe V shaped on a pointed ridge

33
Q

On a topo map how are drainages shown?

A

V shaped V bottom points uphill.

34
Q

How is a box canyon shown on a topo map?

A

Canyon with walls on three sides

35
Q

How are saddles shown in a topo map?

A

A low area along a ridge between two high areas

36
Q

What is contour interval?

A

The difference in elevation between the contour lines

37
Q

What is an index contour?

A

Every fifth contour that is printed darker with elevation marked on it

38
Q

What are range lines?

A

A series of lines six miles apart running north and south

39
Q

What are township lines?

A

A series of lines running east to west six miles part

40
Q

On a map where is North?

A

The top (unless specified

41
Q

The normal size topo map used?

A

7.5 minute quadrangle

42
Q

1in. = 24,000in is what?

A

A representative fraction

43
Q

Map Color

BLACK

A

Man made

44
Q

Map Color

BLUE

A

Water

45
Q

Map Color

GREEN

A

Vegetation

46
Q

Map Color

BROWN

A

Relief

47
Q

Map Color

RED

A

Major Road

48
Q

What are the two maps mostly used?

A

Planimetric, Topographic

49
Q

A line drawing, to some scale, of the earth’s surface is?

A

The definition of a map

50
Q

One Township is equal to how many square miles?

A

36 square miles

51
Q

(True / False)

There are 640 acres in 1 square mile?

A

TRUE

52
Q

(True / False)

Compass readings are magnetic Azimuth?

A

TRUE

53
Q

(True / False)

Map readings are true Azimuth?

A

TRUE

54
Q

What does USGS stand for?

A

United States Geological Survey

55
Q

What does a legend show?

A

Key accompanying the map which shows information needed to interpret that map.

56
Q

What are the 3 types of topo maps?

A

Contour maps, shaded maps, slop maps

57
Q

What do fire lookouts use to determine the location of a fire?*

A

Intersecting

58
Q

What is the Universal Transverse Mercator (UTM)?

A

A grid system that divides the earth into vertical and horizontal sections (lat and long)

59
Q

Five most common colors found on a map an what do they mean?

A
  • Black=cultural or human made features
  • Blue=water features lakes rivers
  • Green=Vegetation such as woods and orchards
  • Brown=all relief features contours, lots and fills
  • Red=main roads, built up areas and boundaries
60
Q

Three types of planimetric maps are?

A
  • Common road maps
  • Specific area maps
  • CDF administrative maps
61
Q

What cardinal point is usually on top of a map and bottom right left?

A

North, South, East, West

62
Q

1 Mile =how many feet?

A

5,280 feet

63
Q

1 yard= how many feet?

A

3 feet

64
Q

1 acre= how many feet?

A

43,560 square feet

65
Q

1 chain= how many feet?

A

66 feet

66
Q

Three basic parts of a compass?

A
  • Magnetic needle
  • 360 dial
  • Transparent base plate.
67
Q

**1 degree of latitude can be divided into…….****

A

60 minutes

68
Q

**What is Intersection?

A

locating two points on a map by intersecting two known landmarks

69
Q

**A representative fraction, what is a map scale?*

A

Scale expresses the ratio of the maps distance to the ground, distance in same measurements

1: 24,000 - 7.5
1: 62,500
1: 250,000

70
Q

**What is a graphic scale on a map?

A

Compares distance to the ground distance in different units of measurements
ie; 1 = 1 mile on the map

71
Q

*****Resection is used to….

A

determine one’s own landmark

72
Q

*****How would you read?

3821.88N 12056.57

A
  • Thirty eight degrees twenty one point eighty eight minutes North Latitude BY (X)
  • One hundred twenty degrees fifty-six point fifty-seven West Longitude
73
Q

***U Shape is…

A

Ridge

74
Q

**V Shape is…..

A

Drainage or narrow valleys. The point of the “V” always points uphill or upstream

COA #53 (10 decks)

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