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Sailing

Sailing is motion across a body of water in a sailing ship, or smaller boat, powered by wind.

Table of contents
1 How sailing works
2 Basic sailing techniques
3 Sailing hulls and hull shapes
4 Sailing terminology
5 Sailing regulations
6 Sailing traditions and etiquette
7 See also
8 External links

How sailing works

The force of the wind is used to create motion by using one or more sails. The movement of the air over the sails acts in the same way that air moves over an aircraft's wing. The pressure difference created on either side of the sails drives the boat forward. In sailing, usually, two or more sails are used in conjunction with another to maximise the smooth flow of air. The sails are adjusted to create a smooth laminar flow over the sail surface. This is called the "slot effect".

Today, for most people, sailing is a hobby. Sailing can be further divided into two areas: Racing and Cruising.

In ancient times (see Odysseus), ships used following or rear-quarter winds. They therefore had to wait in port or at sea for the right wind directions.

Basic sailing techniques

First see the notes on points of sail which introduce some important principles.

Turning a sailing boat

There are four basic maneuvers a sailing boat can perform while underway. They are:
  • Tack - Tacking is turning the boat so that the bow turns through "no go zone".
  • Gybe - Gybing is turning the boat so that the stern of the boat turns through the wind.
  • Heading or Luffing up is turning the boat to sail closer to the direction the wind is coming from.
  • Bearing away is turning away from the direction the wind is coming from.

Trim

An important aspect of sailing is keeping the boat in "trim". To achieve this a useful mnemonic (memory aid) is the phrase.

Can This Boat Sail Correctly?

This helps the crew to remember these essential points;

  • Course to Steer - Turn the boat using the wheel or tiller to the desired course to steer. See points of sail. This may be a definite bearing (e.g steer 270 degrees), or towards a landmark, or at a desired angle to the apparent wind direction.

  • Trim - This is the fore and aft balance of the boat. The aim is to adjust the moveable ballast (the crew!) forwards or backwards to achieve an 'even keel'.

  • Balance - This is the port and starboard balance. The aim, once again is to adjust weight 'inboard' or 'outboard' to prevent excessive heeling.

  • Sail - Trimming sails is a large topic. However simply put, a sail should be pulled in until it fills with wind, but no further than the point where the front edge of the sail (the luff) is exactly in line with the wind.

  • Centreboard - If a moveable centreboard is fitted then it should be lowered if sailing "close to the wind" but raised up on downwind courses. The centreboard helps to provide lateral stability when the wind is hitting the hull from the side. It also helps the boat to track it's 'close to the wind' course. On more downwind courses it is needed less and should be raised up to a higher position to reduce drag.

Beating an upwind course

By linking together a series of 'close-hauled' legs it is possible for the boat to make an upwind course. In between in each leg the boat 'tacks' through the 'no go zone'.

Reducing sail

An important safety aspect of sailing is to adjust the amount of sail to suit the wind conditions. As the wind speed increases the crew should progressively reduce the amount of sail. On a small boat with a jib and mainsheet this is done by furling in the jib and by partially lowering the mainsail (this is called 'reefing').

Sail trimming

As noted above, sail trimming is a large subject. Basic control of the mainsail consists of setting the sail so that it is at an optimum angle to the wind,(i.e. no flapping at the front, and tell tales flowing evenly off the rear of the sail).

More detailed aspects include specific control of the sail's shape, e.g.:

  • reefing, or reducing the sail area in stronger wind
  • flat or full according to wind speed,
  • raking of the mast when going upwind (to tilt the sail towards the rear, this being more stable),
  • providing sail twist to cope with gusty conditions, and
  • controlling the slot, i.e. the gap between the foresail(s) and the main sail to optimise airflow over the main

Heeling

When a boat leans over to one side, it's called heeling. To prevent heeling, (in a smaller boat), the crew may move 'outboard' onto the high side of the boat. On some yachts the crew can hike out (using hiking straps if available). Hiking out means bracing your feet on the bottom of the boat or under the straps and lean out over the high side as far as possible.

As a sailing boat heels several forces begin to counteract this movement. Firstly the force of the buoyancy of that part of the hull which is being submerged, secondly the force of the water pushing back against the centreboard or keel , and lastly the wind spilling from the top of the sail. All these forces will tend to right a heeling boat. However if the boat heels suddenly beyond a certain point of stability it can capsize.

Sailing close to the wind

Modern sailing ships are able to steer towards the wind from an average of 25 degrees relative to apparent wind for most sloop-rigged yachts, to as little as 16 degrees for modern (America's cup type) racing sloops. How close a boat can sail to the wind depends on the wind speed, since what the boat "sees" is the apparent wind, i.e., the vector sum of the actual wind and the boat's own velocity. The apparent wind is what the windex on top of the mast shows. Because of this, people often talk about how close a boat can sail to the apparent wind. A good sloop can sail within 25 degrees of apparent wind. Perhaps an America's Cup sloop can sail within 16 degrees, under the right conditions. Those figures might translate into 45 degrees and 36 degrees relative to the actual wind. The angle at which the wind meets the boat is described by points of sail.

Sailing safety

Sailing is intrinsically dangerous, since water is not our natural element. All sailors therefore should take precautions, and when engaged in publicly organised activities they must take certain precautions, as detailed by the authority which regulates the training or racing.

Safety measures include:

  • Provision of a safety boat for rescue purposes
  • Appropriate firefighting and first aid equipment to hand
  • Carrying of a knife suitable for cutting rigging or netting which may entrap a sailor underwater
  • Wearing of buoyancy aids
  • Observing of the Collision Regulations(see below):
    • Port gives way to Starboard
    • Windward gives way to downwind boat (if on the same tack)
    • Overtaking boat gives way if above do not apply
    • It is everybody's responsibility to avoid a collision, and avoiding action must be taken if these rules are ignored.

Sailing hulls and hull shapes

Sailing boats can have one, two, or three
hullss. Boats with one hull are known as monohulls, while those with two or more are known as multihulls. Multihulls can be further subdivided into catamarans (two hulls), and trimarans (three hulls). A Sailing boat is turned by a rudder which itself is controlled by a tiller or a wheel. Smaller sailing boats often have a stabilising, raisable, underwater fin called a centreboard (or daggerboard); larger sailing boats have a fixed keel. As a general rule, the former are called dinghies, the latter yachts. (see Dinghy sailing)

Sailing terminology

Sailors use many traditional nautical terms for the parts of or directions on a vessel; starboard (right), port (left), forward or fore (front), aft (rearward), bow (forward part of the hull), stern (aft part of the hull). Vertical spars are masts, horizontal spars are booms (if they can hit you), gaffs (if they're too high to reach) or poles (if they can't hit you).

Too many ropes!

Actually, only a few of the "ropes" on a boat are called ropes.

Ropes or wires that hold up masts are collectively known as standing rigging and are called shrouds or stays. (The one from the mast to the bow is usually called the "fore stay", and side ones are usually referred to as just "shrouds".)

Ropes or wires that control the sails are known collectively as running rigging. Those that raise and lower sails are called halyards. Ropes that adjust (trim) the sails are called sheets. These are often referred to using the name of the sail they control (eg. "main sheet", or "jib sheet").

Ropes used to tie the boat up when alongside are called lines or springs.

There are some ropes: A few examples, the bell rope (to ring the bell), a bolt rope (attached to the edge of a sail for extra strength), a foot rope (on old square riggers for the sailors to stand on while reefing or furling the sails), and a tiller rope (to temporarily hold the tiller and keep the boat on course). A rode is what keeps an anchor attached to the boat when the anchor is in use.

Other terms

Walls are called 'bulkheads'. The toilet is traditionally called the 'head', the kitchen is the 'galley'. Sails in different sail plans have unchanging names, however. For the naming of sails, see sail-plan.

Sailing terms have entered popular language in many ways. "Broken up" was the fate of a ship that hit a "rocky point." "Pooped" refers to the aftermost deck of a ship, taken from "puppis" the Latin word for "stern". "In the doldrums" referred to being becalmed, windless, especially in the narrow band of hot windless water "the doldrums", near the equator. "Adrift" meant literally that a ship's anchor had come loose, and the ship was out of control near land and therefore in serious danger. "Keel-hauled and hung out to dry." was the rather nasty process of attaching a sailor to a rope, and drawing him under the sailboat while underway, and then hanging him from a yard-arm (under his shoulders usually, not by his neck), where officers and crew could mock him. Often, the barnicles on the hull would cause lacerations, making this a particularly unpleasant punishment.

Sailing regulations

Sailors are expected to know the essentials of boating safety which include;

Sailing traditions and etiquette

There are many, more esoteric, etiquette rules, traditions, and customs that will demonstrate to others advanced knowledge of boating protocol such as; pulling up the fenders when you're not in port, the use of flags.

See also

Sail, Yachting, ketch, sail-plan, cat boat and sloop, Catamaran, Dinghy sailing, Dinghy racing, Yacht racing, Day sailer.

External links

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Sail Magazine
For sailors of all types (cruisers/racers/day sailors) from novice to expert. Includes many industry links.
http://www.sailmag.com

Blue Water Sailing
Monthly magazine for off shore sailors. "Mission is to pick up where others leave off and to tell it like it is...no sugar coating and no ad-speak BS."
http://www.bwsailing.com

Freshwater Seas
An online magazine, book catalog, and art catalog for everyone who cares about sailing in the Great Lakes region.
http://www.freshwaterseas.com

Catamaran Sailor
Newspaper that covers any and all news concerning beach cats of all brands and breeds. We also devote a lot of space to the larger cruiser/racer multihulls in the 22-to-36-foot range.
http://catsailor.com/

Sailing World
Ezines featuring sailing and cruising news, racing reports, resources, bulletin board, and articles on boats and gear.
http://www.sailingworld.com/

Latitude 38
Northern California's Leading Sailing & Marine Magazine
http://www.latitude38.com/

Latitudes and Attitudes Magazine
This California magazine covers the sailing/cruising world.
http://www.latsandatts.net

48th North
Sailing magazine with sailboats for sale, gift shop, classified ads, weather and sailing links.
http://www.48north.com

Sailing Now
The sailing magazine on the web. Everything for the internet sailor is here, features and articles, classifieds and crewlists, tests and a forum. Our content is comprehensive and regularly updated.
http://www.sailingnow.com/

Semaphore World Sailing
Information about sailing and yacht racing - includes Seahorse Magazine.
http://www.semaphore.co.uk/sailing

Buy A Boat Magazine
UK magazine for buying or selling craft. Searchable database of craft, free lineage, details of how to advertise and subscribe.
http://www.buyaboat.co.uk

SpinSheet Magazine
Magazine specifically devoted to Chesapeake Bay sailing. The magazine's content includes racing, cruising, general sailing, and junior sailing with a unique Chesapeake flavor.
http://www.spinsheet.com

Multihulls World
Nautical review presenting on line boats tests, a datasbase of advertisements and useful addresses, a shop and information for catamarans, trimarans and sailing ships fans.
http://www.multihulls-world.com

Sailing New Zealand
New Zealand's only magazine dedicated to sailing.
http://www.sailing.co.nz/

Southwinds Magazine
Local news for southern sailors. Racing and cruising news from 12 southern states, Cuba, the Bahamas, and the Caribbean.
http://www.southwindssailing.com

Practical Sailor
Online version of the twice-monthly magazine of sailing. Offers boats and sailing gear reviews. Includes some feature articles.
http://www.practical-sailor.com/

Marine Trader Media
Europes classified advertising for boats for sale. On-line database and links.
http://www.boats-for-sale.com/



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