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Sailing

Questions about wind-propelled water vessels, their maintenance, handling and rules governing their use.

2,485 Questions

The first voyage that sailed completely around the world was headed by?

Ferdinand Magellan. Although he personally didn't survive the ordeal, his ship and crew did.

Why do sailing ships have trouble sailing at the equator?

It's not at the equator that the problems occur; it's a few degrees north and south of the equator. Coriolis force from the earth's rotation causes the same airflow patterns that make the trade winds in other parts of the globe to circulate up and down instead of across the surface of the planet.

These latitudinal bands, the Doldrums and the Horse latitudes, are places where there can be no wind for weeks. If you're operating under sail power alone, you can get stuck for a surprisingly long period of time.

Can a boat sink in the rain?

Yes, but most boats have drains in the open cockpit area (scuppers) to allow the rainwater to flow back outside to the sea or lake. Most boats that do sink, sink for some other reason than rain.

In addition to an all-round white light what lights must power-driven vessels less than 65.6 feet long exhibit when underway between sunset and sunrise?

Rules of the Road

International/Inland

Lights & shapes

Rule 23-Power-driven vessels underway

(a) A power-driven vessel underway shall exhibit:

(i) a Masthead light forward;

(ii) a second masthead light abaft of and higher than the forward one; except that a vessel of less than 50 meters in length shall not be obliged to exhibit such a light but may do so;

(iii) sidelights; and

(iv) a stern light

*note on side lights. Red is port side (left) and green is starboard side (right)

If sailboats a and b are approaching each other with the wind on different sides why is vessel a consider the giveaway vessel?

A vessel is considered the 'give way' vessel to avoid a collision.
Which vessel is the give way vessel depends on the situation and according to
COLREGS - International Regulations for

Preventing Collisions at Sea

How do sails propel a boat forward what principle does a sail cause and object to move?

A sail can act in different ways.

It can catch the wind straight on which causes the boat to be dragged along, like holding a bag in front of a fan.

Or it can catch the wind at an angle. This makes the sail work like an aeroplane wing. The wind makes the sail curve and air rushes over the front (concave or indented side) and over the back (the convex or bowed out side).

The air passing over the back, bowed out side moves faster than the air on the front so the pressure on that side is lower. This causes lift which pulls the boat in that direction.

(research lift of wings to get a full understanding how this works)

This lift effect can be used to move a boat in a different direction to the way the wind is blowing. This is why boats tack or zig zag sometimes rather than go in a straight line. Learning to set the sails and how to manoeuvre when the wind isn't blowing the way you want to go. Is more like an art than a science. The basics can be picked up quickly but it takes many years or even a lifetime to become an expert. They act as aerofoils, much like the wings of an aeroplane, and work by the air pressure difference on the surfaces of the sails.

How fast do sailing ships travel?

it depends on what kind of sailing ships you are thinking of.

Modern Maxi-yachts have logged over 40 knots sailing downwind in the Roaring Forties, surfing the huge rollers of the Southern Ocean. The Maxi Class yachts with their light-weight, composite kevlar- carbon-fibre & resin-glass hulls, and their huge sail areas, - which compete in the trans-Oceanic and Round The World races - are the fastest mono-hull sailing yachts in the world.

The large modern racing catamarans and trimarans which also compete in the trans-Oceanic and Round The World races, routinely exceed 30 knots for hours at a time.

Viking Longship replicas such as the "Sea Stallion" have reached 18 knots sailing downwind in favourable conditions due to their long, narrow, lightweight hulls. In the right conditions such hulls will also surf the waves when running or reaching before the wind. Under oars, the Sea Stallion has proved capable of reaching 5 Knots for short periods of no more than 10 to 15 minutes at a time - after which the rowers have been as temporarily exhausted as any Olympic Rower. A more usual speed for any viking ship under oars would have been around 3 knots; the oarsmen rowing more-easily could maintain that kind of speed for around 40 minutes at a time before needing relief at their rowing benches..

Coming down the size scale and looking at more-modern hull designs, I believe that the classic 10sq.M Canoe singlehander is still one of the world's fastest mono-hull racing dinghy Classes due to the righting-power gained from sliding seats in the early versions, and the trapezes more commonly in use now. Explanation - more righting-power leverage allows more sail-area, which equals more speed on any point of sailing.

And - still on the subject of racing dinghies within the budgets of ordinary folk - the 505, Flying Dutchman, Javelin, Hornet, Osprey and Fairey-Marine Jollyboat Classes - were all capable of actually planing while going to windward - where most other modern dinghy classes can only reach those "planing" speeds on a run or a quartering-reach downwind.

The Rule of thumb for the top speed of a modern mono-hull racing dinghy is that it will be unlikely to ever be able to plane faster than it's waterline length in knots. Thus theoretically - a Flying Dutchman could plane at almost 20 Knots; while a GP14 could only plane at 14 Knots.

And for the largest sailing ships of the "Great Age of Sail"? in the late-1890 to early-1900's Era of the great sailing ships, the German, steel 5-masters - the 5000grt. ship-rigged 'Preussen' [launched 1902] and the barque-rigged 'Potosi' [launched 1895] of the Hamburg-based "Laeisz Line", - are on record as having reached 18 knots and maintained that speed for hours at a time on their round trips from Europe to the Chilean Nitrate Isles and back. These great sailing ships were designed to use a Gale as a "good working breeze", being able to retain "all plain sail" when smaller vessels were forced by rising windspeeds to furl their Royals, Topgallants, and upper-Topsails, and reduce down to "lower-topsails and courses"; - and all of the steel-built "P-Line Vessels had specially strengthened rigging and sails, to make such speeds possible. The 'P-Liners' -as they were nicknamed because Laeisz christened them all with names beginning with "P......." [Pomona, Padua, Priwall, Preussen, Potosi, Parma, etc.] - were designed to compete with the late-Victorian steam cargo ships, - which in those two decades - only averaged around 9 knots.

I hope this spread of examples will be enlightening..

Why is a keel used?

A keel stabilizes a boat allowing it to go in a straight line (one direction).

A sailboat is operating under sail at night?

A sailboat can certainly be operating under sail at night. Sailboats use their sails when there is enough wind to carry them.

Did the invention of triangular lateen sails make it possible for ships to sail more easily into the wind?

Allegedly, the lateen sail design made it possible to sail closer into the wind. That is, less than 45 degrees from the direction the wind is blowing. No sail boat can sail directly into the wind. Yet.

When was Grosse Pointe Yacht Club created?

Grosse Pointe Yacht Club was created in 1914.

Is sailing difficult to learn?

It is difficult to start but once you learn is very easy to jump into any boat and sail. It is a lifetime sport or leisure.

Where is the vin on a sailboat?

Sailboats small personal boats don't have a vin number like a car does. There may be a serial number from the manufacturer. Some states have registration numbers like a license number but not all states do. Now a boat 'trailer' has a vin and license number because it is considered to be a vehicle driven or pulled on the road.