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Displaying items by tag: Geophysical Survey

The Department of Transport has been advised of a geophysical marine route survey operation taking place in the Northeast Atlantic Ocean off Galway and Mayo from next week.

The survey activity will take place within the Irish TS, Irish CZ and Irish EEZ and is scheduled to begin today, Monday 7 June for completion some five months later in early November, weather permitting.

The survey will be conducted by the RV Ridley Thomas (callsign V7JK2) which will undertake 24/7 cable route operations.

Survey operations will include the stern deployment of a sonar towfish tethered with steel cable at varying water depths, to collect geophysical/bathymetric mapping data for a proposed undersea telecommunications cable.

The vessel will be monitoring VHF channels 16 and 13, and will display appropriate lights and signals. All vessels operating within the survey areas are requested to keep their distance, maintaining a safety zone around the survey vessel and pass at minimum speed to reduce vessel wash.

Full details of the survey, including relevant coordinates, are included in Marine Notice No 35 of 2021 which can be downloaded below.

Published in News Update

Green Rebel Marine in Crosshaven intends to conduct geophysical survey operations off the South Coast between Cork and Waterford cities over an extended period of time, up to a year from this Thursday 3 June.

The survey 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.

The geophysical survey will use a multibeam echosounder and sub-bottom profilers, which will be hull-mounted, as well as side-scan sonars and magnetometers that will be towed using dedicated winches at cable lengths dictated by the water depth (typically four times the water depth while acquiring data).

Full details of coordinates of the survey areas are included in Marine Notice No 33 of 2021, a PDF of which can be downloaded below.

Published in Coastal Notes

Green Rebel Marine in Crosshaven is set to undertake a geophysical survey operation in the Celtic Sea from next week.

The survey from next Wednesday 26 May to 23 June, weather permitting, will be conducted by the Roman Rebel (callsign 2ICA5) using hull-mounted multibeam and sub-bottom profiling systems.

In addition, the vessel will be towing side-scan sonars and magnetometers using dedicated winches at cable lengths dictated by the water depth. Typically, the cable lengths will be about four times the water depth while acquiring data.

The Roman Rebel will display appropriate lights and signals and all survey operations will be conducted 24 hours a day, continuous over day and night.

Full details of coordinates of the survey areas are included in Marine Notice No 32 of 2021, which can be downloaded below.

Published in Coastal Notes

Following the recent notice of geophysical surveys for the Codling Wind Park comes news of a series of geotechnical surveys in the Irish Sea off Wicklow for the project set to commence tomorrow, Monday 26 April.

Works to characterise the wind park area will be conducted until Saturday 26 June, weather permitting, from the LB Jill (callsign WDH 6208) on a 24-hour basis. The vessel will display appropriate lights and shapes.

As the LB Jill will be restricted in ability to manoeuvre, all vessels operating within the work area are requested to keep their distance, maintaining a safety zone around the geotechnical investigation vessel, and pass at minimum speed to reduce vessel wash.

Further details including coordinates for the survey works are included in Marine Notice No 28 of 2021, which can be downloaded below.

Published in Coastal Notes

Green Rebel Marine will conduct a geophysical survey campaign over 15 days between this Monday 26 April and Friday 4 June, weather depending.

The works, which will involve the use of multibeam echo-sounder and sub-bottom profiling systems, will take place at a number of locations off the West Coast

The survey will be conducted by the Roman Rebel (callsign 2ICA5), a semi-SWATH catamaran with all equipment hull-mounted which operates out of Green Rebel Marine’s base at Crosshaven Boatyard. The Roman Rebel will conduct 24-hour operations.

Further details including coordinates of the work areas are included in Marine Notice No 27 of 2021, which can be downloaded below.

Published in News Update

The Department of Transport has been advised that a marine geophysical survey will be carried out from 5-30 May southwest of Rockall Plateau and across the Porcupine Abyssal Plain and Porcupine Seabight.

This survey is part of the Irish marine research programme project PORO-CLIM and is being carried out with the support of the EU Eurofleets+ programme (Project PORO-CLIM, Survey Code CE21008).

The survey will be conducted by the RV Celtic Explorer (callsign EIGB). The vessel will display appropriate lights and signals. All survey operations are 24 hours, continuous over day and night.

The vessel will on occasion be towing a hydrophone cable and other equipment up to a maximum of 1,000 metres behind the vessel. The vessel will be restricted in its movements when towing a cable astern.

Full details of coordinates for these survey works are included in Marine Notice No 17 of 2021, a PDF of which can be downloaded below.

Published in Marine Science

Geophysical surveys are being undertaken in the Irish Sea in outer Dundalk Bay from this week.

The work is required to provide bathymetric and subsurface information for the development of the Oriel Wind Farm project.

Survey work was expected to start yesterday, Tuesday 20 August, with a view to completion by Monday 30 September, though these dates are weather dependent.

The surveys will be completed using the AMS Retriever (Callsign MEHI8), a versatile multi-purpose, shallow draft tug.

This vessel is towing survey equipment up to 100 metres astern and will be restricted in its ability to manoeuvre.

Other vessels are requested to leave a wide berth. The AMS Retriever will be operating from approximately 6am to 9pm during survey works.

Details of co-ordinates of the survey area are included in Marine Notice No 29 of 2019, a PDF of which is available to read or download HERE.

Published in Coastal Notes

A seabed debris clearance, environmental baseline and habitat assessment site survey will take place in licence SEL 1/11 (Barryroe) from later this month.

Barryroe is located in the North Celtic Sea, some 50 kilometres south of the Port of Cork.

The project is scheduled to commence in mid-August 2019 with the survey vessel Kommandor (callsign MCJO2) anticipated to be working on location for 16 days, excluding transit and any weather delays

Survey operations will be conducted on a 24-hour basis in different phases to include towed and non-towed operations. A fisheries liaison Officer will be on board for the duration of the survey.

Throughout the survey operations, the vessel will be displaying appropriate shapes and lights to indicate that the survey vessel is restricted in its ability to manoeuvre.

All vessels are requested to give this operation a wide berth. A listening watch will be maintained on VHF Channel 16, and the vessel will actively transmit an AIS signal.

Full details of the site survey co-ordinates are included in Marine Notice No 27 of 2019, a PDF of which is available to read or download HERE.

Published in Offshore

Hydrographic and geophysical surveys will be undertaken in the Irish Sea off the Wicklow coast between June and September 2019 to provide bathymetric and subsurface information to facilitate the development of the Arklow Bank Wind Park.

The survey dates are weather dependent but are anticipated to start in June and be completed by the end of September.

The location of the surveys will be off the Wicklow coastline. They will be completed using two vessels working in parallel across the site. The vessels involved are the AMS Panther (Callsign: 2EHC2), which is a 17m windfarm support catamaran, and the AMS Retriever (Callsign: MEHI8) which is a versatile multi-purpose shallow draft tug.

Both vessels will be engaged in survey operations and will be restricted in their ability to manoeuvre. The vessels will be towing survey equipment up to 100 metres astern. Vessels are requested to leave a wide berth. The vessels will be operating 24 hours per day during survey works.

Details of the survey area and relevant co-ordinates are included in Marine Notice No 11 of 2019, a PDF of which is available to read or download HERE.

Published in Marine Warning

#MarineNotice - Maynooth University will carry out a geophysical research survey off the North West Coast of Ireland from next weekend. 

Work is expected to commence on Sunday 6 May and last for approximately nine days, subject to weather conditions.

The Marine Institute’s research vessel RV Celtic Voyager (Callsign EIQN) is scheduled to carry out the works for the Mara survey, undertaken by researchers in Maynooth University to collect geophysical acoustic survey data as well as sediment grab and core samples.

The survey will use relatively low amplitude sound sources to image into the seabed including an echosounder and a sparker system, which will allow for the characterisation of seabed type to inform the deglacial dynamics of the climatically driven British Irish Ice Sheet.

The vessel will, on occasion, be towing a hydrophone cable and other equipment, up to a maximum of 50 metres behind the vessel. The vessel will be restricted in its movements when towing a cable astern.

All other vessels are requested to give the operation a wide berth. The vessel will be listening on VHF Channel 16 throughout the project.

Details of the survey area, relevant co-ordinates and contact information are included in Marine Notice  No 19 of 2018, a PDF of which is available to read or download HERE.

Published in Marine Science
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The Half Ton Class was created by the Offshore Racing Council for boats within the racing band not exceeding 22'-0". The ORC decided that the rule should "....permit the development of seaworthy offshore racing yachts...The Council will endeavour to protect the majority of the existing IOR fleet from rapid obsolescence caused by ....developments which produce increased performance without corresponding changes in ratings..."

When first introduced the IOR rule was perfectly adequate for rating boats in existence at that time. However yacht designers naturally examined the rule to seize upon any advantage they could find, the most noticeable of which has been a reduction in displacement and a return to fractional rigs.

After 1993, when the IOR Mk.III rule reached it termination due to lack of people building new boats, the rule was replaced by the CHS (Channel) Handicap system which in turn developed into the IRC system now used.

The IRC handicap system operates by a secret formula which tries to develop boats which are 'Cruising type' of relatively heavy boats with good internal accommodation. It tends to penalise boats with excessive stability or excessive sail area.

Competitions

The most significant events for the Half Ton Class has been the annual Half Ton Cup which was sailed under the IOR rules until 1993. More recently this has been replaced with the Half Ton Classics Cup. The venue of the event moved from continent to continent with over-representation on French or British ports. In later years the event is held biennially. Initially, it was proposed to hold events in Ireland, Britain and France by rotation. However, it was the Belgians who took the ball and ran with it. The Class is now managed from Belgium. 

At A Glance – Half Ton Classics Cup Winners

  • 2017 – Kinsale – Swuzzlebubble – Phil Plumtree – Farr 1977
  • 2016 – Falmouth – Swuzzlebubble – Greg Peck – Farr 1977
  • 2015 – Nieuwport – Checkmate XV – David Cullen – Humphreys 1985
  • 2014 – St Quay Portrieux – Swuzzlebubble – Peter Morton – Farr 1977
  • 2013 – Boulogne – Checkmate XV – Nigel Biggs – Humphreys 1985
  • 2011 – Cowes – Chimp – Michael Kershaw – Berret 1978
  • 2009 – Nieuwpoort – Général Tapioca – Philippe Pilate – Berret 1978
  • 2007 – Dun Laoghaire – Henri-Lloyd Harmony – Nigel Biggs – Humphreys 1980~
  • 2005 – Dinard – Gingko – Patrick Lobrichon – Mauric 1968
  • 2003 – Nieuwpoort – Général Tapioca – Philippe Pilate – Berret 1978

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