Hydrographic Surveying 1.2 to 1.3 most important

Question 1

Definition of Hydrography

Accepted Answer

Measurement and description of physical features of bodies of water and the prediction of their changes over time

Question 2

Primary purpose of hydrographic surveying

Accepted Answer

Safe and efficient navigation

Question 3

Five-step process from measurement to decision

Accepted Answer

Measure → Reference → Process → Represent → Decide

Question 4

Question answered by horizontal control

Accepted Answer

Where is the sounding? (Defines coordinate reference framework)

Question 5

Question answered by vertical control

Accepted Answer

Relative to what level? (References water surface elevation and reduced depth)

Question 6

Seven basic operations of hydrographic surveying

Accepted Answer

Reconnaissance → Planning & preparation → Horizontal control → Vertical control → Topographic survey → Hydrographic survey → Map preparation

Question 7

Six core planning considerations

Accepted Answer

Purpose, Extent, Method, Resources, Schedule, and Risk

Question 8

First step before mobilizing a hydrographic survey crew

Accepted Answer

Reconnaissance

Question 9

Scope of topographic survey in hydrography

Accepted Answer

Mapping the adjacent land-water interface (shoreline, banks, structures, aids to navigation)

Question 10

Scope of hydrographic survey in field acquisition

Accepted Answer

Measuring the bottom and submerged features (positioning depths, detecting hazards)

Question 11

Six key components of field acquisition readiness

Accepted Answer

Platform, Positioning, Depth sensor, Ancillary sensors, Checks, and Backups

Question 12

Six steps of hydrographic data processing

Accepted Answer

Ingest → Correct → Clean → Verify → Build → Archive

Question 13

Purpose of crosslines and calibration checks

Accepted Answer

Ensuring survey data quality and consistency before demobilization

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