Hydrography Introduction

Question 1

What is hydrography?

Answer 1

A science that allows us to build up knowledge of the physical aspects of the sea floor and the land areas adjacent to it

Question 2

What are the uses of hydrography?

Answer 2

• Measure depth
• Navigation
• Making detailed maps
• Maintaining Ports and Harbours
• Oil and Gas
• Coastal Management
• Military operations
• Discovering wrecks
• Spotting anomalies

Question 3

What type of instruments do hydrographers use?

Answer 3

• Acoustics
• Positioning
• ROVs
• AUVs
• Remote sensing - don’t directly interact eg lasers and satellites
• Auto subs

Question 4

What are the areas of application?

Answer 4

• Ocean exploration
• Coastal ecology surveys
• Oil and Gas
• Dredging and Ports
• Navigation
• Seabed Classification

Question 5

Ocean exploration

Answer 5

• sub sea morphology
• Ocean trenches
• submarine sea mounts
• sound travelling in water

Question 6

Coastal ecology surveys

Answer 6

• zonation
• pollutants
• habitats of organisms
• intertidal regions

Question 7

Oil and gas

Answer 7

• position of oil and gas
• risers/platform positions
• tidal impacts
• measurement techniques

Question 8

Dredging and ports

Answer 8

• navigation channels
• harbours and Ports
• areas for beach nourishment
• monitoring infrastructure

Question 9

Navigation

Answer 9

• safe areas of passage

- charting areas

Question 10

Seabed classification

Answer 10

• seabed types

- identification of habitats and organisms