Menu
Allianz and Afloat - Supporting Irish Boating

Ireland's sailing, boating & maritime magazine

In association with ISA Logo Irish Sailing

Displaying items by tag: Hydroacoustic Survey

#MarineScience - Researchers at NUI Galway, along with partners at the Irish Centre for Research in Applied Geosciences (iCRAG) and the Marine Institute, are currently carrying out a marine hydroacoustic survey in the eastern margin of the Porcupine Basin.

Continuing till this Saturday 16 June, the project conducted from the RV Celtic Voyager (Callsign EIQN) involves generating an acoustic sound source (seismic airgun) adjacent to a short-term deployment of a hydrophone mooring and drifter array in order to investigate noise propagation across the Irish continental margin. The project is planned to inform research into noise pollution as part of Ireland’s obligations under the Marine Strategy Framework Directive (MSFD).

Approximate locations of fixed moorings and seismic noise transect are included in Marine Notice No 24 of 2018, a PDF of which is available to read or download HERE.

Fixed moorings will include yellow surface buoys with warning lights: high intensity, quick flash, continuous, yellow. The drifter will include a yellow surface buoy with nav light: 5 flashes every 20 seconds, yellow, 2nm distance.

The RV Celtic Voyager is displaying appropriate lights and signals and will be within the vicinity at all times throughout the survey.

Researchers also emphasise that the closest distance from survey to any marine SAC is over 16 nautical miles. Commercial fishing and other marine operators are requested to keep a 3nm distance from any survey instrument moorings, and to keep a 2nm distance around the entire survey area clear of any gear or apparatus during the survey period outlined above.

Published in Marine Science

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

Featured Sailing School

INSS sidebutton

Featured Clubs

dbsc mainbutton
Howth Yacht Club
Kinsale Yacht Club
National Yacht Club
Royal Cork Yacht Club
Royal Irish Yacht club
Royal Saint George Yacht Club

Featured Brokers

leinster sidebutton

Featured Webcams

Featured Car Brands

subaru sidebutton

Featured Associations

ISA sidebutton dob
ICRA
isora sidebutton

Featured Events 2020

Wave button for Afloat new dates

Featured Sailmakers

northsails sidebutton
uksails sidebutton

quantum sidebutton

Featured Chandleries

CHMarine Afloat logo
osm sidebutton
https://afloat.ie/resources/marine-industry-news/viking-marine

Featured Marinas

dlmarina sidebutton

Featured Blogs

W M Nixon - Sailing on Saturday
podcast sidebutton
mansfield sidebutton
BSB sidebutton
sellingboat sidebutton

Please show your support for Afloat by donating