SAR Fundamentals/Navigation instruments theory/Question bank

1

Name 3 ways that a GPS can fail.

• radio interference
• blocked view of sky
• cold batteries
• wet electronics

10

Will a GPS work well in heavy fog?

Yes.

2

Is a GPS effective in a heavy blizzard?

Yes

3

Is a GPS effective in a canyon?

no, (probably not)

4

The difference between true north and magnetic north is known as?

Declination.

5

How accurate (in meters) is a GPS with and without WAAS?

With WAAS, 1m. Without WAAS 10-15m.

6

Can you use a South American compass in North America?

Only if it has a global needle.

7

What four instruments are effective used for foot navigation in the wilderness?

pace counter, compass, altimeter, GPS

8

What does declination mean?

It's the difference in degrees between True North and Magnetic North for a region.

9

Name 4 different types of instruments used to help navigate for ground SAR.

• Compass
• GPS
• Altimeter
• Pace counter