Corryvreckan Maelstrom & Thunder Child II documentary
published on 28 July 2020 (on YouTube: on 27 July 2020) - 334
Found on YouTube. Created by "Frank Kowalski".
Safehaven Marine undertook an 800nm 4 day cruise in Thunder Child II to Scotland, living off the boat to visit a place called the Gulf of Corryvreckan. A pretty wild yet beautiful place.
The Corryvreckan whirlpool, or ‘Maelstrom’, as would be a more appropriate description, is formed as the tide enters the narrow stretch of water between the Islands of Jura and Scarba that is the Gulf of Corryvreckan. Here the tidal flow speeds up to 8.5kts as it is squeezed between the islands, and there it encounters a variety of underwater seabed features. On the western entrance a basalt pinnacle rises up from depths of 70m to 29m, and lying to East, directly in front of the pinnacle is a deep hole in the seabed, with a depth of 219m.
As the water flows through the gulf it falls into this hole, and then encounters the steep face of the pinnacle, causing a massive upwelling surge of water to rise to the surface. On a flood tide this surge meets swells entering the Gulf from the West, and creates standing waves that can reach heights of 9m. These ‘standing waves’ are not like normal waves as they form directly over the pinnacle, standing still and breaking heavily on the spot. Whirlpools are also formed over the pinnacle as well as throughout the Gulf, as opposing water columns sheer, and these can be up to 50m wide.
During a storm on spring tides it is said that the angry roar from the seething waters of the maelstrom, with its standing waves and whirlpools can be heard up to 10 miles away, and local mythology refers to this as the voice of ‘Cailleach’ (The Hag) of the Whirlpool.
In a well found boat the gulf can be safely navigated in fair conditions, or at slack water, but I can imagine that in a Westerly gale on a flood tide, you wouldn’t want to be anywhere near the place, as it would truly be described as ‘Unnavigable’. Indeed it was once classified as such by the Royal Navy. On the day we visited with Thunder Child we had Westerly winds of Force 5 gusting 6, and a 3.9m tide which enabled us to experience the standing waves on the flood and the whirlpools on the ebb.
The word Corryvreckan translates to ‘Cauldron’ and that perfectly describes the seething sea state around the whirlpools, and it was quite an experience to have the throttles set for 6kts, holding station just ahead of the standing waves that were breaking behind the boat, and not be moving at all!
There is an Old Irish text known as Cormac’s Glossary written by the King and Bishop of Cashel, Cormac mac Cuilennáin who died in the year 908: “There is a great whirlpool which is between Ireland and Scotland to the north, in the meeting of various seas, its thunderous eructation and its bursting and its roaring are heard among the clouds, like the steam boiling of a cauldron of fire.” I felt that was a pretty cool description of the place as how the place might have appeared of old during a storm.
Coryvreckan is reputed to produce the third largest whirlpools after the Saltstraumen and Moskstraumen Maelstroms in Norway, however the unique submarine topography of the gulf of Corryvreckan and its capability to produce dangerous standing waves means that in storm conditions, it is potentially one of the most violent stretches of water in the world.
The Voyage: Casting off at Cobh in the afternoon on Saturday 18th July 2020 Thunder Child II arrived at Bangor marina at 9.30pm for refuelling after averaging 32kts over the 275nm run. Overnighting on aboard we set sail early Sunday morning heading up the Northern Ireland coast to Rathlin Island, itself a place notorious for producing challenging seas with its tidal strong race and overfalls, before a lumpy crossing to Scotland to enjoying two days taking Thunder Child II through the standing waves and whirlpools in the Gulf of Corryvreckan, and capturing some cool Ariel drone video. Whilst we were there It was also nice to see one of our old Interceptor 42 passenger boats ‘Venturer’ for the first time since we built her 15 years ago, and still looking good. Operated by Craignish Cruises running boat tours in the Gulf, they guided us on a tour around the islands visiting the notorious ‘Grey Dogs’ tidal race and seeing the Sea Eagles nesting nearby.
Spending Sunday night isolated on the breakwater at Ardfern marina we headed to Belfast late afternoon on Monday. Next day we were onwards to Dun Laoghaire for lunch and down the East coast of Ireland where we we’re buzzed overhead by Rescue 116 of the Irish Coastguard, which was great to experience and gave us the excuse to give Thunder Child the beans, and although heavy with fuel we still managed to hit over 50kts.
We arrived home to East Ferry Marina, Cobh late Tuesday evening after an enjoyable voyage for her crew comprising: Skipper Frank Kowalski and crew: Carl Randalls (Drone pilot) Ciaran Monks, Mary Power and Kenny Carrol. During the voyage Thunder Child II ran faultlessly and proved her capabilities of averaging high speeds for long distances.
Opinion Sea Trials in Stroms at the Entrance to Cork Habour
by Safehaven Marine - published on 3 March 2020
The entrance to Cork Harbour situated on the South coast of Ireland can produce some pretty extreme sea states during the winter storm months. There are two main factors that influence the sea state at the entrance, the first being the ebbing tide, the second being shoaling waters over the Harbour Rock, this is situated at the entrance to the Harbour off Roches Point lighthouse, right in the middle between the Western and Eastern channel entrances.
Article Cromarty Firth Port Authority (CFPA) is seeking for new pilot boats
by Marine-Pilots.com - published on 17 April 2020
Cromarty Firth Port Authority (CFPA) is seeking a contractor to build and deliver a new pilot vessel as part of a major project to upgrade its fleet of vessels. The contract for the work is currently being put out to tender and interested parties are encouraged to apply before the deadline of 8 May, 17.00.
Article ‘SANAAG’ A new Pilot boat for the Port of Berbera, Somaliland in Africa delivered by Safehaven Marine.
by Safehaven Marine - published on 20 April 2020
Safehaven Marine based in Ireland have just delivered a pilot vessel for operations at the Port of Berbera in
Somaliland, Africa. ‘Sanaag’ is one of Safehaven’s Interceptor 38 pilot vessels, at 11.9m LOA, a very capable design which proves economical to operate, yet capable of dealing with very rough seas and challenging boarding conditions when required.
Video Hart Marine and the ORC Pantocarene Pilot Boat
Article LYMAN-MORSE ANNOUNCES BALTIC WORKBOATS PARTNERSHIP
by Baltic Workboats AS - published on 15 December 2019
Since 1978 Lyman-Morse has built more than 110 vessels, ranging from aluminum workboats to high-end composite racing yachts and luxury power yachts. “Their experience with so many different building materials opens up a world of new possibilities for our vessels,” says Baltic Workboats’ CEO Margus Vanaselja.
Video San Ciprian’s new Interceptor 42 pilot boat ‘San Cibrao’ during rough weather sea trials.
Found on YouTube. Created by "Frank Kowalski".
Here’s a nice video of the rough weather sea trials of San Ciprian’s new Interceptor 42 Pilot boat ‘San Ciprano’. With the Covid-19 travel restrictions in place and the Guys from San Ciprian unable to fly here at present we’re having to do a remote ‘on-line handover’. So we made this video to give them every confidence that she is performing well, as she handled comfortably the stormy conditions prevailing on the South Coast of Ireland last Friday nicely, with winds of 50kts at the entrance to Cork Harbour, and over 4m heavily breaking seas offshore in the shoaling waters off the Daunt Rock, presenting the exact heavy weather conditions she was designed and built for. As the pilots in San Ciprian have to deal with the challenging seas of the Bay of Biscay in wintertime, we wanted to ensure she was up to the task. She is due to be shipped overland shortly where she is needed urgently to ensure essential pilotage to ships entering and departing the Port in Northern Spain.
Irish builder Safehaven Marine has launched a new pilot boat slated for the Port of San Ciprian in Spain.
The vessel has an LOA of 13.4 metres, a moulded beam of 4.3 metres, a draught of 1.3 metres, and seating for one operator and up to five pilots.
Article New ProZero P-Top Model Launched
by Marine-Pilots.com - published on 30 April 2020
Tuco Marine Group has added the new 9,3-meter P-top design to the ProZero series.. The low-weight, semi-open design results in a faster workboat that has a larger operational range and extended working time on sea. The P-top features a protective P-top console solution and flexible seating arrangements which can accommodate up to 12 passengers or a full deck cargo.
Video Failed overtaking of another ship in a canal - Port Revel Shiphandling
Found on YouTube. Created by "Port Revel". From 2014...
Manoeuvring large ships at close quarters and on shallow water is one of the most difficult aspects of shiphandling because of the complex hydraulic interactions depending on the ships' speeds, on the water depth and on lateral restrictions like in canals. Training is conducted both on meeting and on overtaking ships in shallow waters. This video shows how overtaking in a canal can easily fail.
More information: http://www.portrevel.com/3781-shiphan...