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Engineering Topic #8: Fastnet Rock Lighthouse

  • 02-01-2009 4:31pm
    Posts: 16,720 ✭✭✭✭ Joe Freezing Leper

    Was on my way back from west cork (funnily enough!) a few days ago when I saw this article on Fastnet Rock Lighthouse. It's a long one and if you don't want to read it here the link to the Economist article is at the bottom. Thought it might be a good read for anyone on this board :)

    If anyone has any ideas for articles/topics that would be good for a discussion fire ahead!

    On Ireland’s south-western tip, at the mouth of the Atlantic, stands a monument of man’s gift to mankind.

    IT WAS a hazy night in July 1904 and the steamer Alexandra ploughed slowly through the waters of West Cork, as an extraordinary experiment took place on deck. She was a rickety vessel, “as leaky as a sprat net” in the words of Sir Robert Ball, Ireland’s most feted astronomer of the time. But he loved being aboard her. Almost every night her bespectacled old chef served him copious helpings of boiled lobster. After supper, he could climb on deck and relish two of his night-time passions: study of the gentle stars and, as scientific adviser to the Commissioners of Irish Lights, study of the illumination from lighthouses built around Ireland’s treacherous coastline.

    On this night, there were no stars visible; a light drizzle fell. But with the help of a mirror that he manoeuvred expertly, he measured the intensity of a new light from a lighthouse that he had never seen before. At 19 miles (30km) distance, the flashes were “splendid”. At 22 miles, the glow still spread over the surface of the sea. As the Alexandra turned back to port, Sir Robert was spellbound by the brilliant whiteness of the light he was watching. “I cannot describe them otherwise than by saying they were magnificent. At ten miles, the great revolving spokes of light, succeeding each other at intervals of five seconds, gave the most distinctive character possible…it was a most beautiful optical phenomenon.”

    It was the stars that first helped sailors navigate as they ventured out at night in the world’s earliest leaky boats. But for thousands of years, man-made lights have helped, too. The object of Sir Robert’s wonder was the light from the Fastnet Lighthouse, completed just a month before on on a clump of jagged rock at the gateway to the Atlantic Ocean. At 177 feet (54 metres) high, with a lamp the strength of 1.3m candles, the lighthouse was, as Sir Robert put it after visiting it the next day, “from the navigator’s point of view, the most important outpost of Europe”.

    It was quickly regarded as one of the continent’s most beautiful beacons. For the quality of its engineering, its smooth, cylindrical structure graced the cover of Scientific American, an American scholarly magazine. Its rosette of light inspired numerous poems. For more than 100 years afterwards, its light has helped steer countless people to safety. It provides the first glimmer of Europe for passengers emerging from the grey mists of the Atlantic; for ships passing the other way, it is “the teardrop of Ireland”—a farewell to familiar shores for mournful Irish émigrés.

    It has witnessed excitement, and tragedy. The Titanic sailed past on her maiden voyage to New York in 1912. On May 4th 1915 its keepers, probably peering out from the elegant balcony on the seventh floor, saw a German submarine cheekily surface to buy the morning’s catch from a local Irish fishing boat. According to Éamon Lankford, a local historian who wrote “Fastnet Rock” in 2004, they warned the Royal Navy, but to no avail. The same day, the U-boat sunk the Lusitania, killing 1,200 civilians on their way from America.

    In more modern times, the Fastnet Race, a 615-mile dash from England to Ireland and back, brings some of the world’s fastest sailing vessels hurtling around the rock each year. In 1979 a force-ten gale struck unexpectedly in the waters off Fastnet, crashing 40-foot waves over small vessels. Whole crews were swept overboard and 15 yachtsmen were drowned.

    The men who built the lighthouse, usually photographed with their jackets fastened and their ties done up, were not seamen, nor would they have been particularly accustomed to the huge swells that batter that part of Ireland’s coastline. They were a tiny group of civil servants, far more fascinated by the precise details (weights, measures, sizes, costs) of the engineering feat they were attempting than the human courage that the project required.

    Such descriptions as they left of their work are as shorn of embellishment as the granite stonework. C.W. Scott, who managed part of the project and published its definitive history in 1906, rarely lets himself get swept away by lyricism. He uses far more words explaining the reasons for the 50mm mantles that lit the lamp than he does over the hardships endured by the workers. Those who wanted to go home too often “were gradually got rid of, and their places filled with men who were better satisfied with their rock quarters.”

    Yet their work, technical as it appears, is anything but prosaic. For building a lighthouse could be considered one of man’s most noble endeavours. George Bernard Shaw put it like this: “I can think of no other edifice constructed by man as altruistic as a lighthouse. They were built only to serve.” History bears this out. Since the beginning of seafaring, families and friends have lit bonfires at night to guide sailors home. Mr Lankford vividly paints the picture in nearby Cape Clear, an inhabited island five miles north-east of Fastnet. “From rush to splinter, to a shellful of fish oil, to candle, to paraffin and eventually to electricity, keeping the light burning has been part of the husbandry of the islander.”

    As far back as 261BC, Ptolemy I started building the Pharos of Alexandria, standing over 400 feet tall with an open bonfire that could be seen 29 nautical miles away. It was one of the Seven Wonders of the World and lasted 1,500 years—giving its name in many romance languages to the lighthouse. As their empire expanded, the Romans put up lighthouses as quickly as they expanded trading routes. With the Dark Ages, the lights went out; they ran the risk of attracting marauding Vikings.

    But, according to “A History of Lighthouses” by Patrick Beaver, as stability returned to Europe, monks and hermits began tending beacons in lonely outposts around the British Isles. After Henry VIII’s dissolution of the monasteries in Britain, their place was taken by philanthropic laymen, and lighthouses began to emerge as far across the continent as the Bosphorous. The boldest advance came in the 17th-century, when Henry Winstanley, an eccentric inventor and practical joker (he had chairs in his house that flew up in the air), took it upon himself to build a lighthouse on the lethal Eddystone Rock, 14 miles from the English port of Plymouth. Ultimately it killed him. He, his men and his Oriental-looking tower were washed away in a freak storm in 1703. But it marked the beginning of man’s realisation that lighthouses could be built on the most inhospitable rocks. Two hundred years later, the Fastnet became the latest testimony to that belief.

    The Fastnet Rock is about as rugged as they come. Its Irish name, An Charraig Aonair, means “The Rock that Stands Alone”. Its name in Old Norse, Hvastann-ey, stood for “Sharp-Toothed Island”. The rough waters round about claimed numerous lives and were sung about in 17th-century laments. But it was considered mysterious as well as dangerous. Legend had it that on the summer equinox, it would set sail and visit its neighbours; Bull, Cow, Calf and Heifer Rocks. For centuries it was part of the rich fishing grounds of West Cork’s O’Driscoll clan, and the locals would not have been averse to the odd shipwreck giving them an opportunity for plunder. “Please God, send us a ship,” was long a private prayer along the coast, according to one of Fastnet’s keepers brought up near Crookhaven, the nearest port.

    But by the Victorian era, the benefits of trade and a sense of the common good were taking hold so strongly that the importance of the safety of the sea became paramount. When the Stephen Whitney, an American sailing packet carrying cotton, corn, clocks and cheese, emerged from three days of dense fog in 1847, its captain got his bearings wrong and the vessel was smashed to pieces on the rocks near Fastnet. Of its 110 passengers and crew, 92 died. The disaster led the authorities to decide to mount the first lighthouse on Fastnet, one made of cast-iron, it being the metal of the age. Completed in 1854, it stood on the highest pinnacle of the rock, but even at that height it was pounded mercilessly by high seas, and during storms the crockery would rattle off the table.

    Finally, the newly formed Commissioners of Irish Lights decided on a replacement. They were lucky; much about lighthouses is a family affair, handed down from generation to generation. Their chief engineer was William Douglass, part of the Douglass family who were legends in the lighthouse-engineering business. He and his family had already built lighthouses from Wolf Rock in Cornwall to Ceylon, and when he surveyed Fastnet, he quickly realised that the existing tower was built on the wrong part of the rock. Douglass favoured the harder slate lower down facing the Atlantic head-on; the base was below high-water level at the water’s edge, but that meant the tower would receive the blow of the heaviest seas before they reached full height. It turned out to be an enlightened suggestion.
    Commissioners of Irish Lights The last rock in the jigsaw

    Douglass’s method of building was one invented by his father, Nicholas, on another lighthouse in the 1860s (and used long afterwards in British lighthouses). Concrete blocks were dovetailed into those around it, and cemented into those above and below, like a Chinese puzzle, so that it was impossible to remove any one stone without removing those above it. “This system of dovetail joggles absolutely bonds the entire structure into a virtual monolith,” wrote Scott. The contract to supply the granite was won by Messrs John Freeman and Sons of Penrhyn, Cornwall. In 1897 its workers started chiselling away at 2,074 stones, each weighing from 1.7 to 3 tons to create the puzzle.

    Meticulous to a fault, Douglass ordered the contractors to assemble the tower in sections first in their Cornish yard, to ensure that not a stone was out of place. Each rock was to be delicately wrapped and shipped to Ireland. But from the start of the building work in 1898, bad weather and problems in finding enough good granite delayed the project. Douglass, used to a lifetime of such setbacks, went out to the rock in 1898 to push things along. It was exhausting work, though, and he fell ill. He never really recovered, and the “quiet and reserved man” retired in 1900. “There was probably no man in the world so well fitted by experience to carry out this important and difficult piece of work,” wrote Scott, who then took over the project.
    Each rock to be delicately wrapped and sent to Ireland

    Scott was now technically the boss, but the execution of the project fell into the hands of another remarkable man, James Kavanagh, a young stonemason from Wicklow Town near Dublin, who had first landed on the rock as foreman in 1896 and was personally to place every stone laid in the tower. He was not a lighthouse man by background, but he had that same stubbornness of character. Grainy photographs of him show a portly, charismatic man with a bushy moustache and white jacket, always keeping up appearances.

    He lived on the rock continuously for ten to 12 months of each year from August 1896 to June 1903, sleeping on a damp bed of rock close to the landing strip in quarters carved out of the rock face, known to this day as “Kavanagh’s hole”. He drove his men hard; the day began at 5am, and their first task each day was to clean themselves and their quarters thoroughly. There was no time for sickness. He was fastidious about safety; the men worked with no safety harnesses, but there were only a few minor accidents. As is customary on lighthouses, each man would be responsible for his own food, in this case, mainly rice, peas, tinned meat, biscuits, tea and cocoa. Those on the rock were paid three shillings and sixpence for a nine-hour day, and most stayed on the rock for the whole season, for fear of losing wages if they went ashore and bad weather then prevented them from returning. Kavanagh drove himself harder still. In the years that he allowed himself a few months off, he would return to his wife and eight children in Wicklow. Even then, his grandson James Kavanagh says, the family recall him complaining on fine days that he should be back on the rock, “not wasting time”.

    The white granite rocks, once shipped from Cornwall, would be dropped at a staging post near Crookhaven, then shipped out to Fastnet on a specially built steamer, the Ierne. Landing was impossible; the swell is so high at the rock that only about 12 times a year is a boat able to dock. Instead, the Ierne was moored at sea, and steam derricks from the rock and the ship hoisted the stone out into the sea before lifting it up to the tower. There, Kavanagh would tenderly tease each of the giant stones into place; only six were chipped during the whole process. When the tower was completed, the vertical variation from the plan drawn up seven years before was just 3/16th of an inch, or 0.6cm. It remains a remarkable feat of masonry. The stones are still smooth to the touch. The gunmetal windows fit perfectly. There are elegant mosaics in the floors. Inside, there is no hint that a century of storms have penetrated the flawless exterior.

    Sadly, Kavanagh had no time to admire the result of his craftsmanship. Seven years of living in a hole in the rock, progress frustrated by maverick tides and his delayed shipments, suddenly shattered his health. Having set the last stone, he went ashore with his son (also a mason on the rock) at the end of June 1903 complaining of illness, and died of apoplexy a week later. He never saw the light, which was still being assembled in Birmingham, crown the tower, let alone shine. Five days later, his obituary in the Wicklow Newsletter said that more than a thousand people turned out in his home town to follow his remains from the quayside to his family home. “The greatest respect was shown towards the deceased, all the business houses being shuttered and business suspended while the cortège was passing through.” He was only 47 years old.

    He was not the last of Fastnet’s good men, however. For almost 90 years afterwards, the light, which rotates almost soundlessly in the same vat of mercury that it was built with, was tended by lighthouse keepers who kept the tradition of devout public service alive. Lighthouse engineers may be painstakingly conservative, but lighthouse keepers are just as likely to be unusual. On duty they have any number of tasks to fulfil, but off-duty there are many empty hours to fill. These might have been spent watching storms build up, fishing, reading, or making ships in bottles. Dick O’Driscoll, a keeper who spent 14 years on the rock (and is descended from the original O’Driscoll clan who fished the local waters), recalls morsemen in the lighthouse and on shore became so adept that they would flash messages—even chess moves—to each other in the clouds. For exercise, he would string a rope from the seventh-floor balcony and climb down hand over hand with no safety harness. “What did we do? Sometimes we’d sit. More times we’d sit and think,” he comments wryly.

    Fastnet was peculiar, he says, as he points to a picture of the lighthouse on his sitting-room wall. It may look like Alcatraz on the outside, but inside time never drags. Perhaps that is because of the weight of green and white water that surrounds one; it never stops churning. In stormy winter weather, the “big seas would come sailing up over the entire building like the field of horses in the Grand National,” as one former Fastnet keeper put it. Sometimes, there were almost disastrous consequences; Mr O’Driscoll remembers a storm in 1985 when a wave reached as high as the light and came crashing through the glass, overturning the vat of mercury and sending the poisonous liquid pouring down the stairs. He doubts the tower would have withstood another wallop as great as that, but it never came. Suddenly, there was a great calmness. There were moments of deep sadness, too. Missing children’s birthdays, for example, because the weather turned and the ship could not get close enough to the rock to take him ashore. What do you do at those times? “There’s nothing you can do,” he says. “You slowly climb back upstairs and bake more bread.”

    There was lots of mischief-making, though, that for a time would make the lonely rock light up with Irish laughter. In 1920 a band of volunteer independence fighters raided Fastnet at night, seizing guncotton and detonators to use against the British forces. Curiously, the doors to the arsenal had been conveniently left open that night. A few decades later, Kathleen Lynch, a young lady from Cape Clear whose talent for “hearing the weather” eventually made her invaluable to relief ships and helicopters servicing the lighthouse, also rowed out to it as a teenager. “Once there, the lads would leap out and set to operating the crane and its basket. They’d lift the girls from the boat right onto the rock. And then they’d dance Cape Clear sets, two opposite two, and do slides, a young man squeezing the box for all he was worth away out there in the middle of the sea.”
    Back to loneliness

    Electricity came in 1969, and 20 years later the last full-time keeper left. It is now manned when it needs maintenance by Neilly O’Reilly, a local man who retains the lighthouse keeper’s deep affection for the rock and the stories from its past. But there is no disguising the sense of loss that has crept in since it became fully automated. As Mr O’Reilly kicks hard to open the heavy steel doors on arrival at the lighthouse, he notes that they swing inwards. When Douglass designed them, and Kavanagh built them, they were never made to be opened from outside, because it was not envisaged that the lighthouse would be unmanned. Mr O’Driscoll refers to those doors in his letter* to the Cork Examiner in April 1989 when he last left the lighthouse. “The closing is a very poignant moment, as these large gun-metal doors crash into place behind me for the last time, sealed like a tomb.” Once again, An Charraig Aonair was alone.


  • Registered Users Posts: 2,096 ✭✭✭Tails142

    Seen as nobody has posted a reply thought I'd start the ball rolling... :pac:

    Amazing piece of work and a great article about it. Hard to imagine the difficulties that would've been faced when constructing it and the sheer scope of the task, not to mention the difficulties of communication and transporting materials back in those days.

  • Registered Users Posts: 2,259 ✭✭✭Shiny

    Great story. Thanks Myth.

  • Moderators, Recreation & Hobbies Moderators, Sports Moderators Posts: 15,665 Mod ✭✭✭✭Tabnabs

    Good article OP, looking the that photo it's hard to believe, but it's possible for waves to strike the tower and for the helipad to be awash. I'm told there's a huge BOOM goes up through the tower when this happens and it's pretty scary.


  • Registered Users Posts: 9 jayzbrady

    It's amazing that it was built so accurately. It took an awful lot of skill for it to only be out by .6cm...
    Those guys got madskillz.

  • Registered Users Posts: 1,313 ✭✭✭fabbydabby

    Wow, great topic. Coincidentally, I was only reading about this this evening, though the above post is far more informative. Hoping to get out to this for a look next weekend, as I have been promised a go in a sailing boat in Cork!

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  • Closed Accounts Posts: 57 ✭✭jono,b

    i use to work for the irish lights, and this is know as a hardship ststion, its a pig to be stationed on, but a marvel of engineering.

  • Registered Users Posts: 1,135 ✭✭✭323

    Thanks, a great post.
    Grew up in an Irish Lights family, my dad has couple of great old books published by Irish Lights detailing the construction of this and a number of other rock stations (including the loss of life), up to the building of the Kish, and fantastic elegant solution an extremely difficult engineering problem.

    Seen on discovery channel sometime that it is often overlooked that all through human history, more often than not, the maritime world has led in engineering innovation.

    “Follow the trend lines, not the headlines,”

  • Moderators, Society & Culture Moderators Posts: 24,379 Mod ✭✭✭✭robindch

    Well, a big hello to an old thread :)

    Anyhow, I sailed around the Fastnet ten days back my own Flying Fifteen (yes, I'd a crashboat on call). With the light northwesterly breeze of around ten knots, it was a pretty pleasant Sunday afternoon sail in calm seas. See that two-pixel bump on the horizon in the top photo, just to the left of the mast? That's the Fastnet, so just add one hour's sailing and you're there! Cape Clear and beer dead ahead in the lower pic.


    And here's a video of what the lighthouse itself looks like inside:

  • Posts: 16,720 ✭✭✭✭ Joe Freezing Leper

    robindch wrote: »
    Well, a big hello to an old thread :)

    Anyhow, I sailed around the Fastnet ten days back my own Flying Fifteen (yes, I'd a crashboat on call). With the light northwesterly breeze of around ten knots, it was a pretty pleasant Sunday afternoon sail in calm seas. See that two-pixel bump on the horizon in the top photo, just to the left of the mast? That's the Fastnet, so just add one hour's sailing and you're there! Cape Clear and beer dead ahead in the lower pic.

    And here's a video of what the lighthouse itself looks like inside:

    LOVED the video of the inside, thanks for sharing! I did the fastnet trip with Karycraft from Schull in July, got a great day for it.


    But wow, loved seeing the inside of it, thanks again!

  • Registered Users Posts: 50 ✭✭micha5L

    Great read

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  • Registered Users Posts: 347 ✭✭Gerard93

    Great post, Thanks for sharing.