Parts of the Mast
The mast itself is simply a pole and won't function without several essential parts. Starting from the deck is the mast boot, which keeps water from draining down the mast and into the cabin. The long wires connected to the mast on each side are the stays, and they keep the mast upright under tremendous force. The boom connects to the mast using a gooseneck fitting. Halyard lines, which run to the top of the mast, are used to raise and lower the sail.
Single-Mast Rigs
Single mast sailboats are what most people picture when they think of modern sailing craft. Single mast boats are popular because they're inexpensive to produce and relatively easy to operate singlehanded. The most common kinds of single-mast rigs are sloops, cutters, and catboats.
Sloop Mast
Sloop rig boats are the most common kind of sailboat today. Sloops feature a single mast mounted somewhere on the forward 3/5 of the deck, but some boat designs differ slightly. Generally speaking, a sloop mast lies somewhere in the middle to the forward-middle of the deck.
Sloop masts are rigged for a large mainsail and a jib. Bermuda-rigged sloops utilize a tall single mast and triangular sail. Gaff-rigged sloops, which are less common, use a much shorter mast and a larger four-point mainsail.
Catboat Mast
Catboats are unique vessels common to New England and feature a forward-mounted single mast and a long boom. Unlike sloop-rigged boats, catboats are only rigged for a single sail. Catboat masts are generally mounted almost at the very front of the boat, and they're often short and quite thick.
Catboats are almost often gaff-rigged. Gaff-rigged sail plans make the most of short masts and are relatively easy to control in a single-mast configuration. Gaff-rigged catboat masts are shorter than Bermuda-rigged boats of similar size but generally taller than similar gaff-rigged craft.
Cutter Mast
Cutter-rigged sailboats feature a tall single mast and multiple headsails. Visually, cutters are easy to mistake for sloops. But the mast of a cutter is usually taller than a comparably-sized sloop, as it utilizes multiple headsails instead of a single jib.
Gaff-rigged cutters are much more common than gaff-rigged sloops in many areas. Cutters are easy to distinguish from sloops, even when the sails are stowed. This is because cutters often feature a long bowsprit and two front stays (forestay and jib stay).
Multi-Mast Rigs
Mult-mast rigs are less common than single-mast configurations. That said, multi-mast sailboats are often elegant and seaworthy. Though they offer more than just good looks—multiple masts offer speed and precise control for experienced sailors. Most of these vessels feature two masts, which are often shorter than masts on comparably-sized single-mast craft. The most common variations are yawl rigs, ketch rigs, and schooner rigs.
Yawl Masts
Yawls are robust multi-mast vessels that vary in length from 20 feet to well over 50 feet. A yawl features a long forward mainmast and a short mizzen mast located towards the back of the boat. Yawls are often gaff-rigged and were once used as utility boats.
Yawl rigged sailboats can use the mizzen mast and sail as a form of self-steering. The yawl is easy to distinguish from other two-masted vessels, as the mizzenmast is comparably short—often about half the size of the mainmast. Additionally, the mizzen mast is positioned aft of the rudder post.
Ketch Masts
At first glance, a ketch can be mistaken for a yawl. But the ketch features two similarly-sized masts and a much larger mizzen. The mizzen mast on a ketch is positioned forward of the rudder post. Ketch-rigged boats are often gaff-rigged as well, utilizing topsails on both masts. Some ketch-rigged boats have triangular sailplanes, mitigating the need for topsails.
Like the yawl, the ketch utilizes a headsail, a mainsail, and a mizzen sail, which is comparable in size to the mainsail. Ketch-rigged boats can be sailed with one or more aft sails stowed.
Schooner Masts
Schooners are among the most elegant multi-mast sailboat types. Schooners are visibly closer to ketches than yawls. But upon closer inspection, a schooner will have a shorter foremast and a longer (or almost equally-sized) mast behind it.
Schooner masts are tall and thick but usually shorter than similarly-sized single mast boats. This is because two-masted vessels distribute the sail plan over two masts and don't need the extra length to make up for lost sail area. Schooners are usually gaff-rigged and often utilize topsails and topmasts that extend the height of the mast.
Tall Ship Masts
Tall ships are the classic large sailing vessels that dominated the oceans for hundreds of years before the age of steam. Famous vessels such as the U.S.S. Constitution and the H.M.S. Victory feature this enormous and complex rig configuration.
Tall ships have three or more enormous masts, which are often made from entire tree trunks. Some of the largest tall ships have five or more masts. Tall ships are usually 100 feet in length or greater, as the size and complexity of these square-rigged ships make them only practical at scale. Tall ships utilize one or more mainmasts, mizzenmasts, a foremast, and a gaff-rigged jigger mast aft of the mizzenmast.
Sailboat Mast Materials
Sailboat masts are usually made out of aluminum or certain varieties of wood. Up to the 1950s, virtually all sailboat masts were made of wood. That changed around the same time that fiberglass boats became popular. Today, aluminum is the most common mast material.
Aluminum Sailboat Masts
The most common modern mast material is aluminum. Aluminum masts are lightweight, hollow, and easy to manufacture. These relatively inexpensive masts hold up well to salt water. Aluminum masts are also strong for their weight.
One downside to aluminum masts is galvanic corrosion, which occurs frightfully fast when saltwater comes into contact with aluminum and another metal (such as steel or copper). Aluminum masts are most common on Bermuda-rigged sloops.
Wood Sailboat Masts
Wood is the traditional material for sailboat masts, and it's still used today on many custom boats. Wood masts are heavy but strong, and a well-maintained wood mast can last over a hundred years. Wooden masts are common on gaff-rigged boats, as wood is an ideal material for shorter masts.
The most common mast wood comes from the Fir family. Douglas fir is common, but regional varieties (such as British, Columbian, and Yellow fir) are perfectly suitable. Some sailboats (particularly tall ships) use pine or redwood as a mast material. Some varieties of cedar (such as Port Orford cedar, Oregon cedar, and white cedar) are also excellent materials for building masts and spars.
Carbon Fiber Masts
Carbon fiber masts are a new arrival to boatbuilding, and they offer some advantages to wood and aluminum masts. Carbon fiber is lightweight and extremely strong, which makes it ideal for tall-masted racing sailboats. Vessels that compete in America's Cup races utilize the most premium carbon fiber masts in the industry.
Unlike wood (and aluminum to some extent), carbon fiber masts aren't particularly flexible. The rigidity of carbon fiber makes it strong, but stiffness is also a weakness. Under the right conditions, carbon fiber masts can break violently and are impossible to repair once broken.
Mast Maintenance
It's essential to maintain your mast and all of its accompanying hardware. Mast stays, lines, and halyards should be inspected regularly, adjusted, and replaced at regular intervals. Wooden masts should be varnished and checked for signs of rot.
Aluminum masts are generally low-maintenance, but signs of corrosion warrant immediate repair. Work with your local boat mechanic or sailing expert to develop a comprehensive maintenance plan. And remember, preventative maintenance is always cheaper and easier than repairs.
