Factsheets
Mapping the Seabed
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This factsheet explains how hydrographic surveying is used to map the seabed and support the production of accurate nautical charts.
It describes how surveyors measure water depth using echo sounders that transmit sound pulses to the seabed and calculate depth from the return signal, while also accounting for factors that influence accuracy such as tides, vessel motion and variations in the speed of sound in seawater.
The factsheet also outlines the different technologies used, including single beam and multi‑beam echo sounders and airborne LiDAR, and highlights the challenges of collecting reliable data in dynamic marine environments to ensure safe navigation.
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The Australasian Hydrographic Surveyors Certification Panel (AHSCP) Scheme provides a formal framework for assessing and certifying hydrographic surveyors in Australasia against recognised competency standards, supporting consistent, high‑quality surveying across the region.
Factsheets
This factsheet explains the role of the Australian Hydrographic Office (AHO) in managing hydrographic and undersea feature names within Australia’s geographic naming framework.
Forms
The Australian Hydrographic Office (AHO) manages undersea feature and maritime names information as part of Australia’s place and geographic names framework. To submit a naming proposal for undersea, maritime, navigational, hydrographic or oceanographic features outside coastal waters, complete the attached Hydrographic Undersea Feature Name Proposal form.
Factsheets
This factsheet presents Australia’s official interpretation of the Names and Limits of Oceans and Seas around Australia.