Peter Ramsay

Peter Ramsay

Doctor of Philosophy

About

20
Publications
13,339
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807
Citations
Citations since 2017
2 Research Items
267 Citations
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20172018201920202021202220230102030405060
20172018201920202021202220230102030405060
20172018201920202021202220230102030405060
Introduction
Development of new bathymetric sonars for shallow water unmanned platform applications.
Skills and Expertise

Publications

Publications (20)
Article
Full-text available
T he 82-ft. fishing vessel Emmy Rose was returning from a seven-day trip to the Georges Bank when it sank in the early morning on November 23, 2020 with four crew members on board. At about 1:30 a.m. U.S. Eastern Standard Time, the emergency position-indicating radio beacon (EPIRB) on the vessel emitted a distress signal, and the U.S. Coast Guard (...
Article
Full-text available
Advances in marine & terrestrial scanning survey techniques together with precise inertial navigation sensors, multi-sensor acquisition system and cost-effective UAS photogrammetry allow hydrographic surveyors to undertake high-precision marine asset integrity mapping. The benefit of this approach is that it produces a very accurate three dimension...
Article
Full-text available
With increasing public awareness on climate change issues and increasing pressure on governments to expand renewable energy programmes, the time appears optimum for the development of new marine renewable energy technologies and programmes. Carnegie Wave Energy is an Australian Securities Exchange (ASX) listed company that has developed and patente...
Article
Full-text available
Advances in marine & terrestrial scanning survey techniques together with precise inertial navigation sensors, multi-sensor acquisition system and cost-effective UAS photogrammetry allow hydrographic surveyors to undertake high-precision marine asset integrity mapping. The benefit of this approach is that it produces a very accurate three dimension...
Article
Full-text available
During 2006–2007, the KwaZulu-Natal coast of South Africa was exposed to several large swell events (Ho > 3 m), near the peak of the lunar nodal cycle, causing shoreline recession. The largest swell (Hs = 8.5 m) struck the coast on the March equinox (18th–20th) and generated a strong storm-return flow. Observations made before, during and after rec...
Article
Full-text available
Bathymetry as a discriminatory tool for targeting suitable coelacanth habitats is explored. A regional bathymetry, garnered from pre-existing data sets, and geo-referenced bathymetric charts for the western Indian Ocean is collated and incorporated into a geographical information system (GIS). This allows the suitability of coelacanth habitation, b...
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Full-text available
Subaqueous dunes are formed on the KwaZulu-Natal outer-shelf due to sediment transport by the Agulhas Current (geostrophic current). These dunes occur within two dune fields at depths of − 35 to − 70 m. The net sediment transport direction is south, but short-period reversals form northward-migrating bedforms. The dune fields are physically bounded...
Article
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A multibeam bathymetric survey of six mature-phase and 17 youthful-phase submarine canyons, many of which were previously unknown, on the northern KwaZulu-Natal continental shelf was undertaken in order to define the physical, structural habitat of coelacanths and to guide surveys by manned submersibles within the canyons. Five survey blocks were s...
Article
Full-text available
Marine GeoSolutions (Pty) Ltd was contracted by the National Research Foundation (NRF) of South Africa to undertake a multibeam bathymetric survey of the northern KwaZulu-Natal submarine canyon system to define potential coelacanth habitats for the SA Coelacanth Conservation and Genome Resource Programme. Five survey blocks were defined to include...
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Full-text available
A Late Quaternary sea-level curve for South Africa is presented on the basis of new and published data from a range of sea level indicators and a variety of locations. Available evidence suggests that sea level in South Africa broadly follows that described from the Caribbean but that deviations occur during sea-level highstands. During the last in...
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Full-text available
Beachrocks are good indicators of sea-level stillstands on microtidal coastlines and data for this sea-level curve is mainly based on dating a series of Holocene beachrocks and planation episodes on the southeast African coastline. Sea-level reached its present level along the southern African coastline at ca. 6500 BP; sea-level then rose depositin...
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Full-text available
The geostrophic current-controlled northern Zululand shelf displays a unique assemblage of interesting physical, sedimentological and biological phenomena. The shelf in this area is extremely narrow (3 km) and is characterised by submarine canyons, coral reefs, and steep gradients on the continental slope. Three submarine canyons occur in the study...
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Full-text available
A modern African elephant tusk was discovered within a late Pleistocene aeolianite at Reunion Rocks, south of Durban. Ionium dating indicates that the tusk is older than 112 kyr BP with stratigraphic control suggesting a date at ca. 130 kyr BP. Preliminary carbon stable-isotopic analyses indicate that the elephant was a grass-grazer. Strontium isot...
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A graphics package ("Surfer') for an IBM-compatible microcomputer has been used to develop a three-dimensional model and bathymetric map of a Zululand offshore coral reef. -Author
Article
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Eight distinct zones can be recognized and differentiated on the basis of physiographic and biological characteristics. The reef fauna is dominated by an abundance of alcyonarian (soft) corals, which constitute 60 to 70% of the total coral fauna. The Two-Mile Reef zoning model has been successfully applied to larger reefs such as Red Sands Reef, an...
Article
Full-text available
Until recently ladderback ripples have been considered diagnostic of late-stage emergence run-off in intertidal environments. Observations∗ have demonstrated that ladderback ripples may also occur in the subtidal environment. New underwater observations off the Zululand coast support Reddering's∗ assertion that ladderback ripples are not confined t...
Article
Full-text available
Marine GeoSolutions was commissioned by the port authorities and project engineers to undertake a series of acoustic and sediment sampling surveys in Durban Harbour, to define the engineering properties of harbour sediments, and to assess the stability of various engineering structures within the port. Geophysical survey methods used included multi...

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Projects (2)
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