Displaying items by tag: GLA

26th August 2020

General Lighthouse Authorities Decision to Discontinue DGPS Service in 2022

GLA's among them Irish Lights to discontinue DGPS service in 2023. Afloat's photo of the Irish Lights aids to navigation tender ILV Granuaile off Lamb Island that at low tide is connected to Dalkey Island in Dublin Bay. On the horizon is Irish Ferries chartered-in ropax Epsilon inward bound on a routine Irish Sea crossing from Holyhead, north Wales.

All three General Lighthouse Authorities (GLA) of the UK and Ireland - Trinity House, the Northern Lighthouse Board and Irish Lights - will discontinue their Differential GPS (DGPS) service in March 2022.

The GLAs made this decision after carefully considering the results from an extensive consultation carried out with stakeholders and service users. They will cease transmission of the signal after 31 March 2022.

It was in 1995 that the GLAs introduced DGPS as part of the mix of marine aids to navigation (AtoN) provided to safeguard mariners within their combined waters and to help protect the environment. The system became fully operational in 1997. The system consists of 14 DGPS reference stations, six far-field monitoring sites and three monitoring and control sites. The system is operated as a single AtoN, operated and maintained by the three GLAs.

Dr Alan Grant, GLA DGPS System Director, said: “After careful consideration of the results of the consultation process, the three GLAs have concluded that their DGPS system is now redundant. Today’s GNSS are able to meet all but the most stringent accuracy requirements, and position integrity can be provided by alternative means (RAIM or other visual and electronic aids to navigation).

“The GLAs recognise the need to provide adequate notice and support continuity of service going forward. As such, the DGPS system will remain operational until 31 March 2022, at which point the signals will cease.”

Background

Marine radiobeacon DGPS was developed by the GLAs to counter Selective Availability (SA), a deliberate error added to the civilian GPS service to degrade its positional accuracy. The DGPS correction to the position error meant an improvement in accuracy from approximately 50m to around 5m.

In addition to improving the estimated position accuracy, by assessing whether the error is within a given threshold, the reference station is able to monitor the performance of the GPS constellation and identify any faults. Faulty satellites are removed from the position solution, providing position integrity for the mariner.

SA was discontinued in 2000 and GPS now offers the civilian user a position accurate to around 3-5m. DGPS still improves positional accuracy - now enabling positions in the region of 1-2m - but it is the position integrity function that is most often cited as the main benefit of DGPS.

While marine radiobeacon DGPS is not mandated by the International Maritime Organization for carriage on SOLAS vessels, it is provided for in all maritime receiver standards and the spectrum is allocated internationally.

Consultation

The infrastructure required to run the service is approaching the end of its design life; the GLAs conducted a stakeholder consultation to assess the requirements for the service going forward, surveying and interviewing stakeholders from across the maritime sector and beyond.

Of the responses received, 86% were from mariners and maritime operators, operating a wide range of vessels including ferries, container ships, tankers, liquid natural gas carriers, bulk carriers and leisure craft.

The survey resulted in a mix of responses, with the majority of mariners reporting that they use the DGPS system for accuracy improvements and integrity, while others reported that they do not use it.

All mariners reported using GPS today with around 40% also making use of GLONASS, and around 9% using Galileo too. From the response received, it is expected that more mariners will move to multi-constellation receivers, making use of GPS, GLONASS, Galileo and BeiDou over the next five to ten years.

Maritime Safety

Following a change in maritime receiver standards in 2003, all receivers now include Receiver Autonomous Integrity Monitoring (RAIM). RAIM is a means of determining whether the resulting position estimate is safe to use through an algorithm within the receiver.

Differential corrections are also available from other sources, including Satellite Based Augmentation Systems (SBAS), which are primarily provided for aviation users. Work is under way in Europe to introduce a maritime service to EGNOS, the European SBAS. This service is expected to be available around 2022.

Vessels that need high accuracy position and integrity for operations mainly utilise a number of commercial satellite-based services; the decision to discontinue DGPS has no operational impact on these services.

The GLAs advise mariners to consider their use of DGPS and to plan for its discontinuance accordingly. Mariners should check their GNSS receiver(s) to confirm the presence of RAIM and consider upgrading to type-approved SBAS receiving equipment when available.

The GLAs encourage mariners to use all available AtoN - whether visual or electronic - to support their safe passage and the protection of the environment.

To download a PDF copy of the full DGPS article by Dr Alan Grant click here

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Hard-Working Vessels Keep Lights Switched-On

Sailing was not the only activity that took place in Dublin Bay last Saturday as the Northern Lighthouse Board's (NLB) multi-function tender NLV Pharos was busy at work, writes Jehan Ashmore.

The NLB is the Scottish equivalent of the Commissioners of Irish Lights (CIL) and it is not unusual for such vessels to share work duties beyond their respective jurisdictions. The 84m NLV Pharos is equipped with dynamic positioning and a 30-tonne main crane on her 300m2 aft-deck.

Overall she is similar in appearance to Irish lights ILV Granuaile which is based out of Dun Laoghaire. The Irish Lights tender built in Romania in 2000 tends to operate more often off the west coast during the summer months due to the more favourable weather conditions.

The 1,300 (dwt) deadweight tonnes NLV Pharos yesterday returned to her base in Oban from her Irish duties. The west coast base was established in 1904 and is also homeport to the service's smaller NLV Pole Star which is equipped with an 18-tonne crane on her 90m2 aft deck.

The facility in 2000 underwent a £4.2 million redevelopment to turn a buoy yard into a multi functional support base which is computer-linked to the NLB headquarters in Edinburgh.

In addition Trinity House which maintains the service for England and Wales operate the tenders THV Galtea,THV Patricia and the fast-response craft THV Alert from their base in Harwich.

Trinity House forms the trio of the General Lighthouse Authorities (GLA) alongside NLB and CIL. Each member of the GLA co-operate in the allocation of vessel-tender deployment.

Asides the varied and critical role of the tasks performed by the GLA's tenders, they are also available for charter to third parties. Between them the tenders can conduct buoy and chain work, search and rescue, lighthouse re-fuelling, salvage and recovery, towing, hydrographic applications and ROV work.

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UK to Cease Funding Irish Lights

Britain is to stop paying towards the cost of funding the Commissioners of Irish Lights (CIL) according to a report in Lloyds List. In an agreement reached between London and Dublin, a formal announcement on the timetable for removing the subsidy is expected shortly.

The Irish Government has agreed to pay for its own lighthouses, buoys and other marine aids to navigation. The UK subsidy is likely to be eliminated during the current parliament if all goes according to plan. That is the pledge made by Mr Penning, UK Minister of Shipping on several occasions in recent months. The phase-out will start in the next financial year.

The total cost of providing these services comes to around £75m ($116.5m) a year, of which Irish Lights accounts for €32m. The UK subsidy to Ireland is between £10m and £12m, with the Irish government contributing some £6m and the balance coming from fees.

All three general lighthouse authorities (GLA) are working on ways to cut costs and improve efficiencies, with a joint strategic board set up to consider how they can work together more effectively.

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Volvo Dun Laoghaire Regatta

From the Baily lighthouse to Dalkey island, the bay accommodates six separate courses for 21 different classes racing every two years for the Dun Laoghaire Regatta.

In assembling its record-breaking armada, Volvo Dun Laoghaire regatta (VDLR) became, at its second staging, not only the country's biggest sailing event, with 3,500 sailors competing, but also one of Ireland's largest participant sporting events.

One of the reasons for this, ironically, is that competitors across Europe have become jaded by well-worn venue claims attempting to replicate Cowes and Cork Week.'Never mind the quality, feel the width' has been a criticism of modern-day regattas where organisers mistakenly focus on being the biggest to be the best. Dun Laoghaire, with its local fleet of 300 boats, never set out to be the biggest. Its priority focussed instead on quality racing even after it got off to a spectacularly wrong start when the event was becalmed for four days at its first attempt.

The idea to rekindle a combined Dublin bay event resurfaced after an absence of almost 40 years, mostly because of the persistence of a passionate race officer Brian Craig who believed that Dun Laoghaire could become the Cowes of the Irish Sea if the town and the local clubs worked together. Although fickle winds conspired against him in 2005, the support of all four Dun Laoghaire waterfront yacht clubs since then (made up of Dun Laoghaire Motor YC, National YC, Royal Irish YC and Royal St GYC), in association with the two racing clubs of Dublin Bay SC and Royal Alfred YC, gave him the momentum to carry on.

There is no doubt that sailors have also responded with their support from all four coasts. Running for four days, the regatta is (after the large mini-marathons) the single most significant participant sports event in the country, requiring the services of 280 volunteers on and off the water, as well as top international race officers and an international jury, to resolve racing disputes representing five countries. A flotilla of 25 boats regularly races from the Royal Dee near Liverpool to Dublin for the Lyver Trophy to coincide with the event. The race also doubles as a RORC qualifying race for the Fastnet.

Sailors from the Ribble, Mersey, the Menai Straits, Anglesey, Cardigan Bay and the Isle of Man have to travel three times the distance to the Solent as they do to Dublin Bay. This, claims Craig, is one of the major selling points of the Irish event and explains the range of entries from marinas as far away as Yorkshire's Whitby YC and the Isle of Wight.

No other regatta in the Irish Sea area can claim to have such a reach. Dublin Bay Weeks such as this petered out in the 1960s, and it has taken almost four decades for the waterfront clubs to come together to produce a spectacle on and off the water to rival Cowes."The fact that we are getting such numbers means it is inevitable that it is compared with Cowes," said Craig. However, there the comparison ends."We're doing our own thing here. Dun Laoghaire is unique, and we are making an extraordinary effort to welcome visitors from abroad," he added. The busiest shipping lane in the country – across the bay to Dublin port – closes temporarily to facilitate the regatta and the placing of six separate courses each day.

A fleet total of this size represents something of an unknown quantity on the bay as it is more than double the size of any other regatta ever held there.

Volvo Dun Laoghaire Regatta FAQs

What is Dun Laoghaire Regatta?

Dun Laoghaire Regatta is Ireland's biggest sailing event. It is held every second Summer at Dun Laoghaire Harbour on Dublin Bay.

When is Dun Laoghaire Regatta?

Dun Laoghaire Regatta is held every two years, typically in the first weekend of July.

Where is Dun Laoghaire Regatta held?

As its name suggests, the event is based at Dun Laoghaire Harbour. Racing is held on Dublin Bay over as many as six different courses with a coastal route that extends out into the Irish Sea. Ashore, the festivities are held across the town but mostly in the four organising yacht clubs.

How big is Dun Laoghaire Regatta?

Dun Laoghaire Regatta is the largest sailing regatta in Ireland and on the Irish Sea and the second largest in the British Isles. It has a fleet of 500 competing boats and up to 3,000 sailors. Scotland's biggest regatta on the Clyde is less than half the size of the Dun Laoghaire event. After the Dublin city marathon, the regatta is one of the most significant single participant sporting events in the country in terms of Irish sporting events.

How old is Dun Laoghaire Regatta?

The modern Dublin Bay Regatta began in 2005, but it owes its roots to earlier combined Dublin Bay Regattas of the 1960s.

How many boats compete at Dun Laoghaire Regatta?

Up to 500 boats regularly compete.

How many yacht clubs are represented at Dun Laoghaire Regatta?

Up to 70 different yacht clubs are represented.

Where do the yachts come from to compete at Dun Laoghaire Regatta?

The Channel Islands, Isle of Man, England, Scotland, Wales, Northern Ireland, Ireland countrywide, and Dublin clubs.

How many boats are visiting boats at Dun Laoghaire Regatta?

Nearly half the sailors, over 1,000, travel to participate from outside of Dun Laoghaire and from overseas to race and socialise in Dun Laoghaire.

What type of yachts race in Volvo Dun Laoghaire Regatta?

21 different classes are competing at Dun Laoghaire Regatta. As well as four IRC Divisions from 50-footers down to 20-foot day boats and White Sails, there are also extensive one-design keelboat and dinghy fleets to include all the fleets that regularly race on the Bay such as Beneteau 31.7s, Ruffian 23s, Sigma 33s as well as Flying Fifteens, Laser SB20s plus some visiting fleets such as the RS Elites from Belfast Lough to name by one.

What famous sailors race in Dun Laoghaire Regatta?

Some sailing household names are regular competitors at the biennial Dun Laoghaire event including Dun Laoghaire Olympic silver medalist, Annalise Murphy. International sailing stars are competing too such as Mike McIntyre, a British Olympic Gold medalist and a raft of World and European class champions.

How much does it cost to enter Dun Laoghaire Regatta?

There are different entry fees for different size boats. A 40-foot yacht will pay up to €550, but a 14-foot dinghy such as Laser will pay €95. Full entry fee details are contained in the Regatta Notice of Race document.

Where can spectators view Dun Laoghaire Regatta?

Spectators can see the boats racing on six courses from any vantage point on the southern shore of Dublin Bay. As well as from the Harbour walls itself, it is also possible to see the boats from Sandycove, Dalkey and Killiney, especially when the boats compete over inshore coastal courses or have in-harbour finishes.

How does Dun Laoghaire regatta compare to international regattas?

Very favourably. It is often compared to Cowes, Britain's biggest regatta on the Isle of Wight that has 1,000 entries. However, sailors based in the north of England have to travel three times the distance to get to Cowes as they do to Dun Laoghaire.

Why is Dun Laoghaire Regatta so unique?

Dun Laoghaire Regatta is unique because of its compact site offering four different yacht clubs within the harbour and the race tracks' proximity, just a five-minute sail from shore. International sailors also speak of its international travel connections and being so close to Dublin city. The regatta also prides itself on balancing excellent competition with good fun ashore.

Who organises Dun Laoghaire Regatta?

The Organising Authority (OA) of Volvo Dun Laoghaire Regatta is Dublin Bay Regattas Ltd, a not-for-profit company, beneficially owned by Dun Laoghaire Motor Yacht Club (DMYC), National Yacht Club (NYC), Royal Irish Yacht Club (RIYC) and Royal St George Yacht Club (RSGYC).

What does Dun Laoghaire Regatta contribute to the local economy?

The Irish Marine Federation launched a case study on the 2009 Volvo Dun Laoghaire Regatta's socio-economic significance. Over four days, the study (carried out by Irish Sea Marine Leisure Knowledge Network) found the event was worth nearly €3million to the local economy over the four days of the event. Typically the Royal Marine Hotel and Haddington Hotel and other local providers are fully booked for the event.