CH Bathymetric Data Acquisition & Processing

Question 1

What is the primary function of a multibeam echo sounder in hydrographic surveying?

Accepted Answer

Mapping underwater features using multiple beams

Answer

Measuring atmospheric pressure

Answer

Tracking tidal variations

Answer

Calculating vessel speed

Question 2

Why is sound velocity profiling important in bathymetric surveys?

Accepted Answer

To correct echo sounder data for refraction

Answer

To determine wave height

Answer

To measure air temperature

Answer

To calculate tide levels

Question 3

Which of the following instruments is used to measure the depth of the seafloor?

Accepted Answer

Single-beam echo sounder

Answer

Side-scan sonar

Answer

Tide gauge

Answer

CTD sensor

Question 4

What is the role of motion sensors in bathymetric surveys?

Accepted Answer

Correcting for vessel motion

Answer

Measuring wind direction

Answer

Tracking temperature changes

Answer

Monitoring sediment content

Question 5

What does side-scan sonar primarily provide in a hydrographic survey?

Accepted Answer

Seafloor imagery

Answer

Vertical depth measurements

Answer

Subsurface profiles

Answer

Water temperature data

Question 6

Which correction is typically applied to echo sounder data to account for tidal variations?

Accepted Answer

Tide correction

Answer

Motion correction

Answer

Sound velocity correction

Answer

GPS correction