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Bosun's chair

 
Boating Encyclopedia: Bosun’s Chair

Going up the mast requires planning, careful inspection
A boatswain is a warrant officer in the U.S. and British navies, or a subordinate officer in the merchant marine, who is responsible for most things that happen on deck. The word boatswain is pronounced bosun and has also come to be spelled so.A bosun’s chair is used to haul a sailor up the mast on a halyard to do repair work or inspect the rigging. It was once a wooden plank with stout lines passing underneath it and up into a bridle at chest level. Its weaknesses were that it was hard to sit on for any length of time and there was no back support. You could easily fall backward out of the chair. Consequently, you had only one hand to work with aloft because the other was permanently engaged in a convulsive grip on the nearest spar or rigging wire.The plank has now largely been ousted by fabric chairs with comfortable backs and cushioned seats for today’s pampered derrieres. It’s almost impossible to accidentally fall out of one of these bosun’s armchairs, so it’s much easier to use two hands for the work aloft. These chairs often also incorporate built-in pockets for tools and gear; there’s no need to send all that stuff up in a separate bucket.Some bosun’s chairs are more like circus acrobats’ harnesses, attaching near the hips and allowing you to swirl and spin and do cartwheels aloft—if that is what the skipper requires. These are really climbing harnesses, not chairs, and you’ll see them in action in the America’s Cup series, when some poor foredeck hand has to go up in midrace to untangle a snarl of lines or canvas. They might also have some appeal to athletic sailors seeking a little adventure on otherwise boring trips to the masthead.

A bosun’s chair enables you to ascend the mast on a halyard for repair work or to inspect the rigging. Modern fabric chairs incorporate pockets for tools
No matter what kind of chair you use, you are at the mercy of the winchers and tailers down below. Never trust them. Be sure to take a personal safety tether with you and clip it on at every opportunity. Inspect the halyard thoroughly before you are hoisted on it, and don’t trust the clip or shackle that normally joins it to the head of the sail. Use a light line to bind the chair’s bridle to the halyard, if possible, and take many turns. Or, if there are plenty of slackers about on deck, have them devise a second safety halyard for you, and clip it on.Cruising boats often have mast steps that allow you to climb up without having to depend on anyone else for help, but they create significant windage and are expensive to install. There are also temporary steps comprising loops of Dacron tape sewn to stout line. To use them, hoist the line in the mast groove where the mainsail luff or slides normally fit. In theory, it’s a good idea; in practice, it’s not as easy as you might think. But it’s certainly a convenient piece of gear for a singlehanded voyager.Some enterprising sailors haul themselves up the mast in a bosun’s chair by using counter-weights. Fill some plastic jugs with water and raise them to the masthead on a halyard. Then attach the chair to the halyard, and let the weight of the jugs pull you up the mast. You no doubt will sense the danger inherent when the water jugs weigh more than you do: you could ascend to the masthead much faster than you anticipated, and spend a lot more time up there than you had planned.Beware, too, of stepping out of the bosun’s chair straight onto the deck. Without your weight to counterbalance them, the water jugs will descend speedily and smite you mightily upon the head. If you’re using jugs, be sure to think deeply before you act.Yet another alternative means of going aloft solo is to ascend a rope by means of rock-climbing aids, such as mechanical ascenders (which slide up the rope, then grip when needed) and prusik knots (which accomplish much the same thing).See also Mast Steps

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WordNet: bosun's chair
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Note: click on a word meaning below to see its connections and related words.

The noun has one meaning:

Meaning #1: a seat consisting of a board and a rope; used while working aloft or over the side of a ship
  Synonym: boatswain's chair


Wikipedia: Bosun's chair
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A bosun's chair, in use by a bosun, re-tarring a section of a backstay on the Prince William after making a minor repair.
A seaman "slushes" the wire rope of a freighter's topping lift with grease.

A bosun's chair or boatswain's chair is a device used to suspend a person from a rope to perform work aloft. It is distinguished from a climbing harness by the inclusion of a more or less rigid seat, providing more comfort than even the best-padded straps for long-term use. In exchange, the bosun's chair does not allow the freedom of movement necessary for climbing, and the occupant is generally hoisted or lowered into place using the rope alone.

Some bosun's chairs consist of little more than a short plank and a suitable set of ropes to suspend it from; these are usually used with a separate harness in case the user should slip off the plank. Other bosun's chairs, particularly the type commonly carried on yachts for masthead repair, incorporate more straps so that the wearer cannot fall out, though they still include a rigid or semi-rigid seat.

As well as on ships and boats where they originated, bosun's chairs are also used for working at height on buildings and other structures. In commercial window cleaning, the term 'bosun's chair' is used for other devices suspended from rope and equipped with seatboards, such as controlled descent apparatus (CDAs). However, CDAs cannot be raised and lowered like a true bosun's chair, and can be used for descent only.

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Competition

Bosun's Chair has also become a competition in Sea Scout Regattas around the country such as the Old Salt's Regatta and the Ancient Mariner's Regatta. The event requires a line running through a block connected to a tower, simulating a ship's mast. Two participants approach the line and prepare it for the event. When ready, the participants stand at attention. On the signal from the judges time starts. One person ties into one side of the line using a french bowline. The person places one loop around their waist and the other under their legs. The other person gets ready to pull the first person up to the block. When the person who is tied in reaches the top and touches the block they yell touch. Time then stops and they are slowly lowered to the ground. As soon as the person touches the ground or the two participants touch each other time begins. The first person unties and the second person ties in. The second person is raised to the top, time stops, and they are lowered. Time again starts when the person touches the ground or their partner, and is stopped finally when the knot is untied, and the participants stand at attention again. A competitive time is at least under one minute for the entire operation.

File:Bosun's Chair Competition.jpg
Two members of the Intrepid Crew compete in bosun's chair at the Ancient Mariners Regatta aboard the USS Hornet.

Safety

The competition judges are in charge of safety. If the french bowline is tied wrong or does not have the six inches of tail required, safety will be called and with time running, they will have to fix this. Another reason to call safety is if the loops of the french bowline are not in the right places or are too loose. If the descent is not done in controlled a hand over hand method, the team will be disqualified.

Variations

At the Old Salt's regatta, the bosun's chair is an eight-person competition. Instead of multiple teams of two competing, the entire team lines up for the event. The first person ties in while the second person raises them. Once they touch the ground, the first person unties and is done. The second person then ties in and is lifted by the third person. This continues until the final person lifts someone and the second to last person is lifted, unties and the crew returns to attention.[citation needed]

History

This event is based on a practice from old navy ships. High ranking officers would be lifted onto the ships instead of climbing on board. The bosun's chair would be attached to a block on the davit with a line. The officer would have the chair put under him, or the french bowline tied around him, and then sideboys would lift him onto the deck of the ship on the command of the bosun's whistle. Since higher ranking officers were often richer and therefore heavier, they naturally needed more people to lift them. This is where the practice of having more sideboys for higher ranking officers comes from this in the navy.[citation needed]

Knots that can be used for a Bosun's Chair

See also

References


 
 

 

Copyrights:

Boating Encyclopedia. The Practical Encyclopedia of Boating. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved.  Read more
WordNet. WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved.  Read more
Wikipedia. This article is licensed under the Creative Commons Attribution/Share-Alike License. It uses material from the Wikipedia article "Bosun's chair" Read more