SAR Fundamentals/Navigation instruments theory/Question bank

#	Question	Answer
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