Lesson 6 Flashcards
(8 cards)
1
Q
What is the definition of Doppler principle
A
The apparent change in frequency due to the relative velocity of an object compared to an observer
2
Q
What value for AV do we use in Doppler equation?
A
1450
3
Q
What happens to the Doppler difference with an increase in velocity?
A
Increases
4
Q
What is CPA?
A
Closest point of approach
The point in which h the vessel passes from high to low frequency and the track of the vessel is at 90 degrees to the buoy
5
Q
What can you get from CPA?
A
Track Range Depth Bearing Speed F0
6
Q
What is the equation for speed from CPA?
A
Speed =(difference in freq x1450)/F0
7
Q
What is the calculation for range from CPA?
A
Range = speed x time x 17
8
Q
What are the 2 types of CPA?
A
Broadband
Doppler
