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Displaying items by tag: Geotechnical Survey

Fuinneamh Sceirde Teoranta (FST) will be undertaking both a geotechnical survey and geophysical survey for the Sceirde Rocks Windfarm Project in the Western Coastal Area (Connemara/Outer Galway Bay) and Atlantic Ocean, between Monday 15 April and Monday 10 June, subject to weather and operational constraints.

These surveys follow last September’s geophysical survey and will be undertaken by the multi-purpose offshore vessel Dina Polaris (callsign CQOF), which is fitted with a geotechnical drilling rig, and the research vessel Lady Kathleen (callsign EIXT2). Both vessels will operate up to 24 hours per day and will be displaying the appropriate lights and shapes.

During operations, the vessels will be restricted in their ability to manoeuvre. Therefore, passing vessels are requested to leave a wide berth during the deployment operations. Radio transmissions will be conducted with other seafarers to notify them of the operations. The vessels will be monitoring VHF Channel 16 at all times for safety purposes.

The equipment for each survey will be deployed within the bounds of the survey areas detailed in Marine Notice No 17 of 2024, attached below.

Published in Power From the Sea

The Department of Transport has been advised by Fuinneamh Sceirde Teoranta (FST) that benthic and geotechnical survey vessels will be deployed at the site of the proposed Sceirde Rocks Windfarm in north Galway Bay off southwestern Connemara.

The deployment will take place from this Saturday 29 July — as with the metocean survey previously reported on Afloat.ie — to the end of September, subject to weather and operational constraints.

The benthic survey will take place using the vessel Ocean Navigator (callsign EI018) which will operate in daylight hours. The geotechnical survey will take place using the vessels Geoquip Seehorn (callsign 5BSW) and Glomar Vantage (callsign HO3057) which will operate on a 24-hour basis.

Coordinates and a map of the deployment area as well as contact details can be found in Marine Notice No 47 of 2023, attached below.

Published in Power From the Sea

The Department of Transport has been advised that a geophysical and geotechnical surveys is being undertaken by Green Rebel Marine in the Irish Sea to assess cable burial on behalf of MDM.

The survey work was anticipated to start on Monday 19 June and will be completed by the end of September, subject to weather and operational constraints.

Surveys will be conducted by two vessels: the semi-SWATH catamaran Roman Rebel (callsign 2ICA5) which will conduct 24-hr operations, and the Lady Kathleen (callsign EIXT2), a catamaran which will conduct 12-hr operations. Both vessels will display appropriate lights and signals.

As the survey vessels will be restricted in their ability to manoeuvre when surveying, due to the deployment of the towed survey equipment from the vessel for the duration of the survey activities, other vessels are kindly requested to keep a wide berth.

Mariners are advised to keep continuous watch on VHF Channel 16 when navigating the area.

Coordinates and a map of the survey areas as well as contact details can be found in Marine Notice No 40 of 2023, attached below.

Published in News Update

EGS International Ltd is undertaking a geophysical survey campaign for a proposed offshore wind farm and associated export cable corridor centred around Sceirde Rocks, off the west coast of Ireland near Galway.

The survey was set to commence last week on Friday 10 June and will continue throughout June, July and possibly into August, weather permitting.

The operations will take place in two locations: the Wider Array Site off the coast of Connemara and the Export Cable Corridor (ECC) to the west of the Aran Islands and towards the coast of Co Clare.

The work is being conducted by the EGS Ventus (callsign V7119), which will display the appropriate day shapes/signals and lights as required by the COLREGS and maintain a continuous listening watch on VHF Channel 16 and Digital Selective Calling (DSC).

The vessel will be towing survey equipment astern at 4 knots, which will restrict its ability to manoeuvre. All other vessels operating within this area are requested to keep their distance and pass at minimum speed to reduce vessel wash.

Contact details, coordinates and maps of the survey areas are included in Marine Notice No 36 of 2022, attached below.

Elsewhere, Fugro is engaged in a geotechnical site survey campaign for wind farms in the South Irish Sea (off the Wexford coast) and North Celtic Sea (off the Waterford coast).

Operations were expected to begin on Sunday 12 June and will continue till approximately Tuesday 28 June, weather allowing.

The work is being conducted by the Normand Mermaid (callsign LAXH7) on a 24-hour basis. The vessel will display appropriate lights and markers.

For further details see Marine Notice No 35 of 2022, also attached below.

Published in Power From the Sea

Following the recent deployment of Metocean devices to provide data for the development of the Arklow Bank Wind Park, a geotechnical survey will take place in the same areas of the Irish sea off the Wicklow coast in the coming weeks.

The survey will start in late August or early September, weather depending, and will continue to November. Survey activity will involve drilling around 15 boreholes in the area detailed in Marine Notice No 33 of 2020, available to download below.

Survey works will be conducted by contractor Geoquip Marine using the Geoquip Saentis (Callsign C6UM8), an 80m dynamically positioned specialist survey vessel.

The Geoquip Saentis will be restricted in its ability to manoeuvre during its 24/7 survey operations, and other vessels in the are are requested to leave a wide berth.

Published in Marine Warning

#MarineNotice - The latest Marine Notice from the Department of Transport, Tourism and Sport (DTTAS) advises that ESB International is carrying out a geotechnical survey at the WestWave ocean energy site off the coast of Killard, Co Clare this week.

The survey started Tuesday 22 September and will last between eight and 11 days, weather permitting.

The RV Celtic Voyager (callsign EIQN) is carrying out the work, deploying equipment such as a Vibrocore and a cone penetrometer.

The vessel will be restricted in its ability to manoeuvre while carrying out the survey, and all vessels, particularly those engaged in fishing, are requested to give this operation a wide berth and keep a sharp lookout in the relevant areas.

The work vessel will be listening on VHF Channel 16 throughout the project.

Full details of co-ordinates are included in Marine Notice No 46 of 2015, a PDF of which is available to read or download HERE.

Published in Marine Warning

Sharks in Irish waters

Irish waters are home to 71 species of shark, skates and rays, 58 of which have been studied in detail and listed on the Ireland Red List of Cartilaginous fish. Irish sharks range from small Sleeper sharks, Dogfish and Catsharks, to larger species like Frilled, Mackerel and Cow sharks, all the way to the second largest shark in the world, the Basking shark. 

Irish waters provide a refuge for an array of shark species. Tralee Bay, Co. Kerry provides a habitat for several rare and endangered sharks and their relatives, including the migratory tope shark, angel shark and undulate ray. This area is also the last European refuge for the extremely rare white skate. Through a European Maritime and Fisheries Fund (EMFF) project, Marine Institute scientists have been working with fishermen to assess the distribution, diversity, and monthly relative abundance of skates and rays in Tralee, Brandon and Dingle Bays.

“These areas off the southwest coast of Ireland are important internationally as they hold some of the last remaining refuges for angel shark and white skate,” said Dr Maurice Clarke of the Marine Institute. “This EMFF project has provided data confirming the critically endangered status of some species and provides up-to-date information for the development of fishery measures to eliminate by-catch.” 

Irish waters are also home to the Black Mouthed Catshark, Galeus melastomus, one of Ireland’s smallest shark species which can be found in the deep sea along the continental shelf. In 2018, Irish scientists discovered a very rare shark-nursery 200 nautical miles off the west coast by the Marine Institute’s ROV Holland 1 on a shelf sloping to 750 metres deep. 

There are two ways that sharks are born, either as live young or from egg casings. In the ‘case’ of Black Mouthed Catsharks, the nursery discovered in 2018, was notable by the abundance of egg casings or ‘mermaid’s purses’. Many sharks, rays and skate lay eggs, the cases of which often wash ashore. If you find an egg casing along the seashore, take a photo for Purse Search Ireland, a citizen science project focusing on monitoring the shark, ray and skate species around Ireland.

Another species also found by Irish scientists using the ROV Holland 1 in 2018 was a very rare type of dogfish, the Sail Fin Rough Shark, Oxynotus paradoxus. These sharks are named after their long fins which resemble the trailing sails of a boat, and live in the deep sea in waters up to 750m deep. Like all sharks, skates and rays, they have no bones. Their skeleton is composed of cartilage, much like what our noses and ears are made from! This material is much more flexible and lighter than bone which is perfect for these animals living without the weight of gravity.

Throughout history sharks have been portrayed as the monsters of the sea, a concept that science is continuously debunking. Basking sharks were named in 1765 as Cetorhinus maximus, roughly translated to the ‘big-nosed sea monster’. Basking sharks are filter feeders, often swimming with their mouths agape, they filter plankton from the water.

They are very slow moving and like to bask in the sun in shallow water and are often seen in Irish waters around Spring and early Summer. To help understand the migration of these animals to be better able to understand and conserve these species, the Irish Basking Shark Group have tagged and mapped their travels.

Remarkably, many sharks like the Angel Shark, Squatina squatina have the ability to sense electricity. They do this via small pores in their skin called the ‘Ampullae of Lorenzini’ which are able to detect the tiny electrical impulses of a fish breathing, moving or even its heartbeat from distances of over a kilometre! Angel sharks, often referred to as Monkfish have a distinctively angelic shape, with flattened, large fins appearing like the wings of an angel. They live on the seafloor in the coastal waters of Ireland and much like a cat are nocturnal, primarily active at night.

The intricate complexity of shark adaptations is particularly noticeable in the texture of their skin. Composed of miniscule, perfectly shaped overlapping scales, the skin of shark provides them with protection. Often shark scales have been compared to teeth due to their hard enamel structure. They are strong, but also due to their intricate shape, these scales reduce drag and allow water to glide past them so that the shark can swim more effortlessly and silently. This natural flawless design has been used as inspiration for new neoprene fabric designs to help swimmers glide through the water. Although all sharks have this feature, the Leafscale Gulper Shark, Centrophorus squamosus, found in Ireland are specifically named due to the ornate leaf-shape of their scales.