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CANADIAN BOARD OF EXAMINERS FOR PROFESSIONAL SURVEYORS C12 - HYDROGRAPHIC SURVEYING

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CANADIAN BOARD OF EXAMINERS FOR PROFESSIONAL SURVEYORS C12 - HYDROGRAPHIC SURVEYING

Q. No Time: 3 hours Value Earned

Please define the following in one or two sentences

a) Spring Tide 2

b) HAT 2

c) Semi-Diurnaliurnal tide 2

d) CTD 2

e) Bandwidth 2

f) CHIRP 2

g) Heave 2

h) Harmonic Mean Sound Speed 2

i) Continuous Wave Pulse 2

j) Phase Differencing Multibeam 2

2. Name the three ocean parameters that effect sound velocity in the ocean. 5 3. What factors affect the vertical resolution of a singlebeam echo sounder? 5

4. Describe two methods for measuring sound velocity. 10

5. What is a side or bow mounted transducer and what advantages does it have over a

hull mounted transducer? 5

6. What is acoustic ray tracing? 5

7. What is a chart datum and what is it used for? 5

8. Using a diagram, show how a single beam transducer's beamwidth affects the

soundings horizontal uncertainty. 5

9. What are crosscheck lines and what are they used for? 5

10. Describe the basic principles of MBES transmit and receive beam forming and

steering using flat transducers. 10

11. Name three vessel motion components that affect the horizontal uncertainty of a

multibeam sounding. 5

12. With the help of a diagram describe the relationship between ellipsoidal and

geoidal heights. 10

13. What is IHO S-44 and what is it used for? 10

100

October 2020 Marks Note: This examination consists of 13 questions on 1 page.

1.

C12 - Hydrography October 2020 Page 1 of 1

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