SO102 MAPS AND CHARTS

Question 1

What is the GNC scale and what is it used for?

Answer 1

1:5,000,000, has worldwide coverage, typically used for ling range inflight navigation at high altitudes.

Question 2

What is the ONC scale and what is it used for?

Answer 2

1:1,000,000, has worldwide coverage. Designed for military low level altitude navigation as well as planning jntel briefs, plotting and wall displays.

Question 3

What is the JNC scale and what is it used for?

Answer 3

The JNC scale is 1:2,000,000, coverage is limited to the northern atmosphere. Used for preflight planning and enroute navigation by long range aircraft.

Question 4

What is the TPC scale and what are its uses?

Answer 4

1:500,000, it is the MINIMUM scale for LOW LEVEL FLIGHT.

Question 5

What is the scale of a JOG chart and what are its uses?

Answer 5

1:250,000 the purpose of the JOG is to provide ARMY, NAVY, AIR FORCE WITH A COMMON LARGE-SCALE GRAPHIC.

Question 6

What is a TLM?

Answer 6

An objective area chart, its scale is 1:50,000. Used for preflight planning.

Question 7

What do you call the lines connecting areas of like elevations?

Answer 7

Contour lines.

Question 8

How are shadows cast by elevation shown on charts?

Answer 8

Shading

Question 9

Can aerial photography be used as a chart supplement for objective area planning?

Answer 9

Yes.

Question 10

What does UTM stand for?

Answer 10

The Universal Transverse Mercator

Question 11

How many zones does UTM divide the earth into?

Answer 11

It divides it into 60zones of 6 degree bands of LONGITUDE!

Question 12

How does the Military Grid Reference System (MGRS) split the latitude lines?

Answer 12

Each UTM zone is segmented into 20 LATITUDE bands, each 8 degrees high.

Question 13

What are the first and last letter used in MGRS and what two letters are emitted?

Answer 13

The first letter is C, the last is X and letters “I” and “O” are omitted.

Question 14

Why are “I” and “O” emitted?

Answer 14

Because they look like 1’s and 0’s.

Question 15

How much is band X extended?

Answer 15

4 degrees.

Question 16

Given 4QFJ12345678, what is the gridzone designator(GZD)?

Answer 16

4Q

Question 17

Given 4QFJ12345678, what is the 100,000 meter square identifier?

Answer 17

FJ

Question 18

Given 4QFJ12345678, what is the numerical location and its resolution?

Answer 18

1234 5678 and 10m resolution.

Question 19

Given 4QFJ123567, what is the numerical location and its resolution?

Answer 19

123 567, 100M Here’s the why; if you took away the last digit of the numerical location it would, its resolution would multiply by 10, making it a worse resolution. I.e. 12 56 would be 1km(or 1000m).

Question 20

When abbreviating MGRS grid reference to a lower position do you round the numbers or truncate them?

Answer 20

Truncate.

Question 21

What is the first letter in the northern hemisphere?

Answer 21

“N” so any letter before N in the alphabet is in the souther hemisphere and anything after n is in the Northern hemisphere.