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The mast of a
sailing vessel A sailing ship is a sea-going vessel that uses sails mounted on masts to harness the power of wind and propel the vessel. There is a variety of sail plans that propel sailing ships, employing square-rigged or fore-and-aft sails. Some ships ...
is a tall
spar SPAR, originally DESPAR, styled as DE SPAR, is a Dutch multinational that provides branding, supplies and support services for independently owned and operated food retail stores. It was founded in the Netherlands in 1932, by Adriaan van Well, ...
, or arrangement of spars, erected more or less vertically on the centre-line of a ship or boat. Its purposes include carrying
sail A sail is a tensile structure—which is made from fabric or other membrane materials—that uses wind power to propel sailing craft, including sailing ships, sailboats, windsurfers, ice boats, and even sail-powered land vehicles. Sails may ...
s, spars, and
derrick A derrick is a lifting device composed at minimum of one guyed mast, as in a gin pole, which may be articulated over a load by adjusting its guys. Most derricks have at least two components, either a guyed mast or self-supporting tower, and a ...
s, and giving necessary height to a
navigation light A navigation light, also known as a running or position light, is a source of illumination on a watercraft, aircraft or spacecraft, meant to give information on the craft's position, heading, or status. Some navigation lights are colour-coded r ...
, look-out position,
signal In signal processing, a signal is a function that conveys information about a phenomenon. Any quantity that can vary over space or time can be used as a signal to share messages between observers. The ''IEEE Transactions on Signal Processing'' ...
yard The yard (symbol: yd) is an English unit of length in both the British imperial and US customary systems of measurement equalling 3 feet or 36 inches. Since 1959 it has been by international agreement standardized as exactly 0.914 ...
, control position, radio aerial or
signal lamp Signal lamp training during World War II A signal lamp (sometimes called an Aldis lamp or a Morse lamp) is a semaphore system using a visual signaling device for optical communication, typically using Morse code. The idea of flashing dots and ...
. Large ships have several masts, with the size and configuration depending on the style of ship. Nearly all sailing masts are guyed. Until the mid-19th century, all vessels' masts were made of wood formed from a single or several pieces of timber which typically consisted of the trunk of a
conifer Conifers are a group of conifer cone, cone-bearing Spermatophyte, seed plants, a subset of gymnosperms. Scientifically, they make up the phylum, division Pinophyta (), also known as Coniferophyta () or Coniferae. The division contains a single ...
tree. From the 16th century, vessels were often built of a size requiring masts taller and thicker than could be made from single tree trunks. On these larger vessels, to achieve the required height, the masts were built from up to four sections (also called masts). From lowest to highest, these were called: lower, top, topgallant, and royal masts. Giving the lower sections sufficient thickness necessitated building them up from separate pieces of wood. Such a section was known as a ''made mast'', as opposed to sections formed from single pieces of timber, which were known as ''pole masts''. Those who specialised in making masts were known as mastmakers.


Nomenclature

For square-sail carrying
ships A ship is a large watercraft that travels the world's oceans and other sufficiently deep waterways, carrying cargo or passengers, or in support of specialized missions, such as defense, research, and fishing. Ships are generally distinguished ...
, masts in their standard names in bow to
stern The stern is the back or aft-most part of a ship or boat, technically defined as the area built up over the sternpost, extending upwards from the counter rail to the taffrail. The stern lies opposite the bow, the foremost part of a ship. Ori ...
(front to back) order, are: * ''
Sprit topmast A sprit topmast is a small topmast that was sometimes carried on the end of the bowsprit of a large European warship during the Age of Sail. Its purpose as initially built was to assist the spritsail (square-rigged), spritsail (which hung below it ...
'': a small mast set on the end of the
bowsprit The bowsprit of a sailing vessel is a spar extending forward from the vessel's prow. The bowsprit is typically held down by a bobstay that counteracts the forces from the forestays. The word ''bowsprit'' is thought to originate from the Middle L ...
(discontinued after the early 18th century); not usually counted as a mast, however, when identifying a ship as "two-masted" or "three-masted" * ''Fore-mast'': the mast nearest the bow, or the mast forward of the main-mast. As it is the furthest afore, it may be rigged to the
bowsprit The bowsprit of a sailing vessel is a spar extending forward from the vessel's prow. The bowsprit is typically held down by a bobstay that counteracts the forces from the forestays. The word ''bowsprit'' is thought to originate from the Middle L ...
. ** Sections: fore-mast lower—fore topmast—fore topgallant mast * ''Main-mast'': the tallest mast, usually located near the center of the ship ** Sections: main-mast lower—main topmast—main topgallant mast—royal mast (if fitted) * ''Mizzen-mast'': the aft-most mast. Typically shorter than the fore-mast. ** Sections: mizzen-mast lower—mizzen topmast—mizzen topgallant mast Some names given to masts in
ships A ship is a large watercraft that travels the world's oceans and other sufficiently deep waterways, carrying cargo or passengers, or in support of specialized missions, such as defense, research, and fishing. Ships are generally distinguished ...
carrying other types of rig (where the naming is less standardised) are: * ''Bonaventure mizzen'': the fourth mast on larger sixteenth-century galleons, typically
lateen A lateen (from French ''latine'', meaning "Latin") or latin-rig is a triangular sail set on a long yard mounted at an angle on the mast, and running in a fore-and-aft direction. The settee can be considered to be an associated type of the same o ...
-rigged and shorter than the main mizzen. * ''Jigger-mast'': typically, where it is the shortest, the aftmost mast on vessels with more than three masts. ** Sections: jigger-mast lower—jigger topmast—jigger topgallant mast When a vessel has two masts, as a general rule, the main mast is the one setting the largest sail. Therefore, in a
brig A brig is a type of sailing vessel defined by its rig: two masts which are both square rig, square-rigged. Brigs originated in the second half of the 18th century and were a common type of smaller merchant vessel or warship from then until the ...
, the forward mast is the foremast and the after mast is the mainmast. In a
schooner A schooner () is a type of sailing vessel defined by its rig: fore-and-aft rigged on all of two or more masts and, in the case of a two-masted schooner, the foremast generally being shorter than the mainmast. A common variant, the topsail schoon ...
with two masts, even if the masts are of the same height, the after one usually carries a larger sail (because a longer boom can be used), so the after mast is the mainmast. This contrasts with a
ketch A ketch is a two- masted sailboat whose mainmast is taller than the mizzen mast (or aft-mast), and whose mizzen mast is stepped forward of the rudder post. The mizzen mast stepped forward of the rudder post is what distinguishes the ketch fr ...
or a
yawl A yawl is a type of boat. The term has several meanings. It can apply to the rig (or sailplan), to the hull type or to the use which the vessel is put. As a rig, a yawl is a two masted, fore and aft rigged sailing vessel with the mizzen mast p ...
, where the after mast, and its principle sail, is clearly the smaller of the two, so the terminology is (from forward) mainmast and mizzen. (In a yawl, the term "jigger" is occasionally used for the after mast.) Some two-masted
luggers A lugger is a sailing vessel defined by its rig, using the lug sail on all of its one or several masts. They were widely used as working craft, particularly off the coasts of France, England, Ireland and Scotland. Luggers varied extensively i ...
have a fore-mast and a mizzen-mast - there is no main-mast. This is because these traditional types used to have three masts, but it was found convenient to dispense with the main-mast and carry larger sails on the remaining masts. This gave more working room, particularly on fishing vessels. On
square-rig Square rig is a generic type of sail and rigging arrangement in which the primary driving sails are carried on horizontal spars which are perpendicular, or square, to the keel of the vessel and to the masts. These spars are called ''yards'' and ...
ged vessels, each mast carries several horizontal
yard The yard (symbol: yd) is an English unit of length in both the British imperial and US customary systems of measurement equalling 3 feet or 36 inches. Since 1959 it has been by international agreement standardized as exactly 0.914 ...
s from which the individual sails are rigged. Folding mast ships use a ''tabernacle'' anchor point. Definitions include: "the partly open socket or double post on the deck, into which a mast is fixed, with a pivot near the top so that the mast can be lowered"; "large bracket attached firmly to the deck, to which the foot of the mast is fixed; it has two sides or cheeks and a bolt forming the pivot around which the mast is raised and lowered"; "substantial fitting for mounting the mast on deck, so that it can be lowered easily for trailering or for sailing under bridges", "hinged device allowing for the easy folding of a mast 90 degrees from perpendicular, as for transporting the boat on a trailer, or passing under a bridge"


History

In the West, the concept of a ship carrying more than one mast, to give it more speed under sail and to improve its sailing qualities, evolved in northern
Mediterranean The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the e ...
waters: The earliest foremast has been identified on an
Etruscan __NOTOC__ Etruscan may refer to: Ancient civilization *The Etruscan language, an extinct language in ancient Italy *Something derived from or related to the Etruscan civilization **Etruscan architecture **Etruscan art **Etruscan cities ** Etrusca ...
pyxis Pyxis is a small and faint constellation in the southern sky. Abbreviated from Pyxis Nautica, its name is Latin for a mariner's compass (contrasting with Circinus, which represents a draftsman's compasses). Pyxis was introduced by Nicolas-Lo ...
from
Caere : Caere (also Caisra and Cisra) is the Latin name given by the Romans to one of the larger cities of southern Etruria, the modern Cerveteri, approximately 50–60 kilometres north-northwest of Rome. To the Etruscans it was known as Cisra, to ...
,
Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical re ...
, dating to the mid-7th century BC: a warship with a furled
mainsail A mainsail is a sail rigged on the main mast of a sailing vessel. * On a square rigged vessel, it is the lowest and largest sail on the main mast. * On a fore-and-aft rigged vessel, it is the sail rigged aft of the main mast. The sail's foot ...
is engaging an enemy vessel, deploying a
foresail A foresail is one of a few different types of sail set on the foremost mast (''foremast'') of a sailing vessel: * A fore-and-aft sail set on the foremast of a schooner or similar vessel. * The lowest square sail on the foremast of a full-rig ...
. A two-masted
merchant vessel A merchant ship, merchant vessel, trading vessel, or merchantman is a watercraft that transports cargo or carries passengers for hire. This is in contrast to pleasure craft, which are used for personal recreation, and naval ships, which are us ...
with a sizable foresail rigged on a slightly inclined foremast is depicted in an Etruscan
tomb A tomb ( grc-gre, τύμβος ''tumbos'') is a :wikt:repository, repository for the remains of the dead. It is generally any structurally enclosed interment space or burial chamber, of varying sizes. Placing a corpse into a tomb can be ...
painting from 475 to 450 BC. An ''artemon'' (
Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor ...
for foresail) almost the same size as the
galley A galley is a type of ship that is propelled mainly by oars. The galley is characterized by its long, slender hull, shallow draft, and low freeboard (clearance between sea and gunwale). Virtually all types of galleys had sails that could be used ...
's mainsail can be found on a
Corinth Corinth ( ; el, Κόρινθος, Kórinthos, ) is the successor to an ancient city, and is a former municipality in Corinthia, Peloponnese, which is located in south-central Greece. Since the 2011 local government reform, it has been part o ...
ian
krater A krater or crater ( grc-gre, , ''kratēr'', literally "mixing vessel") was a large two-handled shape of vase in Ancient Greek pottery and metalwork, mostly used for the mixing of wine with water. Form and function At a Greek symposium, krat ...
as early as the late 6th century BC; apart from that
Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor ...
longships are uniformly shown without it until the 4th century BC. Casson, Lionel (1980): "Two-masted Greek ships", ''
The International Journal of Nautical Archaeology The Nautical Archaeology Society (NAS) is a charity registered in England and WalesCharity Commission
...
'', Vol. 9, No. 1, pp. 68–69 (69)
In the East, ancient Indian Kingdoms like the
Kalinga Kalinga may refer to: Geography, linguistics and/or ethnology * Kalinga (historical region), a historical region of India ** Kalinga (Mahabharata), an apocryphal kingdom mentioned in classical Indian literature ** Kalinga script, an ancient writ ...
from as early as 2nd century are believed to have commanded naval sail ships. One of the earliest documented evidence of Indian sail building comes from the mural of the three-masted ship in Ajanta caves that date back to 400-500 CE. The foremast became fairly common on Roman galleys, where, inclined at an angle of 45°, it was more akin to a
bowsprit The bowsprit of a sailing vessel is a spar extending forward from the vessel's prow. The bowsprit is typically held down by a bobstay that counteracts the forces from the forestays. The word ''bowsprit'' is thought to originate from the Middle L ...
, and the foresail set on it, reduced in size, seems to be used rather as an aid to steering than for propulsion. While most of the ancient evidence is iconographic, the existence of foremasts can also be deduced
archaeologically Archaeology or archeology is the scientific study of human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, architecture, biofacts or ecofacts, sites, and cultural landscap ...
from slots in foremast-feets located too close to the
prow The bow () is the forward part of the hull of a ship or boat, the point that is usually most forward when the vessel is underway. The aft end of the boat is the stern. Prow may be used as a synonym for bow or it may mean the forward-most part ...
for a mainsail. ''Artemon'', along with mainsail and
topsail A topsail ("tops'l") is a sail set above another sail; on square-rigged vessels further sails may be set above topsails. Square rig On a square rigged vessel, a topsail is a typically trapezoidal shaped sail rigged above the course sail and ...
, developed into the standard rig of seagoing vessels in imperial times, complemented by a
mizzen The mast of a sailing vessel is a tall spar, or arrangement of spars, erected more or less vertically on the centre-line of a ship or boat. Its purposes include carrying sails, spars, and derricks, and giving necessary height to a navigation ligh ...
on the largest freighters. Casson, Lionel (1995): "Ships and Seamanship in the Ancient World", Johns Hopkins University Press, , pp. 239–243 The earliest recorded three-masters were the giant ''
Syracusia ''Syracusia'' ( el, Συρακουσία, ''syrakousía'', literally "of Syracuse") was an ancient Greek ship sometimes claimed to be the largest transport ship of antiquity. She was reportedly too big for any port in Sicily, and thus only sailed ...
'', a prestige object commissioned by king
Hiero II of Syracuse Hiero II ( el, Ἱέρων Β΄; c. 308 BC – 215 BC) was the Greek tyrant of Syracuse from 275 to 215 BC, and the illegitimate son of a Syracusan noble, Hierocles, who claimed descent from Gelon. He was a former general of Pyrrhus of Epirus an ...
and devised by the polymath
Archimedes Archimedes of Syracuse (;; ) was a Greek mathematician, physicist, engineer, astronomer, and inventor from the ancient city of Syracuse in Sicily. Although few details of his life are known, he is regarded as one of the leading scientists ...
around 240 BC, and other Syracusan merchant ships of the time. Casson, Lionel (1995): "Ships and Seamanship in the Ancient World", Johns Hopkins University Press, , p. 242, fn. 75 The imperial grain freighters travelling the routes between
Alexandria Alexandria ( or ; ar, ٱلْإِسْكَنْدَرِيَّةُ ; grc-gre, Αλεξάνδρεια, Alexándria) is the second largest city in Egypt, and the largest city on the Mediterranean coast. Founded in by Alexander the Great, Alexandria ...
and
Rome , established_title = Founded , established_date = 753 BC , founder = King Romulus (legendary) , image_map = Map of comune of Rome (metropolitan city of Capital Rome, region Lazio, Italy).svg , map_caption ...
also included three-masted vessels. A mosaic in Ostia (c. 200 AD) depicts a freighter with a three-masted rig entering Rome's harbour. Special craft could carry many more masts:
Theophrastus Theophrastus (; grc-gre, Θεόφραστος ; c. 371c. 287 BC), a Greek philosopher and the successor to Aristotle in the Peripatetic school. He was a native of Eresos in Lesbos.Gavin Hardy and Laurence Totelin, ''Ancient Botany'', Routledge ...
(''Hist. Plant.'' 5.8.2) records how the
Romans Roman or Romans most often refers to: *Rome, the capital city of Italy * Ancient Rome, Roman civilization from 8th century BC to 5th century AD *Roman people, the people of ancient Rome *''Epistle to the Romans'', shortened to ''Romans'', a lette ...
imported
Corsica Corsica ( , Upper , Southern ; it, Corsica; ; french: Corse ; lij, Còrsega; sc, Còssiga) is an island in the Mediterranean Sea and one of the 18 regions of France. It is the fourth-largest island in the Mediterranean and lies southeast of ...
n timber by way of a huge
raft A raft is any flat structure for support or transportation over water. It is usually of basic design, characterized by the absence of a hull. Rafts are usually kept afloat by using any combination of buoyant materials such as wood, sealed barrel ...
propelled by as many as fifty masts and sails. Throughout antiquity, both foresail and mizzen remained secondary in terms of canvas size, although large enough to require full
running rigging Running rigging is the rigging of a sailing vessel that is used for raising, lowering, shaping and controlling the sails on a sailing vessel—as opposed to the standing rigging, which supports the mast and bowsprit. Running rigging varies bet ...
. In
late antiquity Late antiquity is the time of transition from classical antiquity to the Middle Ages, generally spanning the 3rd–7th century in Europe and adjacent areas bordering the Mediterranean Basin. The popularization of this periodization in English ha ...
, the foremast lost most of its tilt, standing nearly upright on some ships. By the onset of the
Early Middle Ages The Early Middle Ages (or early medieval period), sometimes controversially referred to as the Dark Ages, is typically regarded by historians as lasting from the late 5th or early 6th century to the 10th century. They marked the start of the Mi ...
, rigging had undergone a fundamental transformation in Mediterranean navigation: the
lateen A lateen (from French ''latine'', meaning "Latin") or latin-rig is a triangular sail set on a long yard mounted at an angle on the mast, and running in a fore-and-aft direction. The settee can be considered to be an associated type of the same o ...
which had long evolved on smaller
Greco-Roman The Greco-Roman civilization (; also Greco-Roman culture; spelled Graeco-Roman in the Commonwealth), as understood by modern scholars and writers, includes the geographical regions and countries that culturally—and so historically—were di ...
craft replaced the
square rig Square rig is a generic type of sail and rigging arrangement in which the primary driving sails are carried on horizontal spars which are perpendicular, or square, to the keel of the vessel and to the masts. These spars are called ''yards'' and ...
, the chief sail type of the ancients, that practically disappeared from the record until the 14th century (while it remained dominant in northern Europe). The
dromon A dromon (from Greek δρόμων, ''dromōn'', "runner") was a type of galley and the most important warship of the Byzantine navy from the 5th to 12th centuries AD, when they were succeeded by Italian-style galleys. It was developed from the an ...
, the lateen-rigged and oared
bireme A bireme (, ) is an ancient oared warship (galley) with two superimposed rows of oars on each side. Biremes were long vessels built for military purposes and could achieve relatively high speed. They were invented well before the 6th century BC a ...
of the
Byzantine navy The Byzantine navy was the naval force of the East Roman or Byzantine Empire. Like the empire it served, it was a direct continuation from its Imperial Roman predecessor, but played a far greater role in the defence and survival of the state than ...
, almost certainly had two masts, a larger foremast and one midships. Their length has been estimated at about 12 m and 8 m respectively, somewhat smaller than the Sicilian war galleys of the time. Multiple-masted ''sailing'' ships were reintroduced into the Mediterranean Sea by the
Late Middle Ages The Late Middle Ages or Late Medieval Period was the Periodization, period of European history lasting from AD 1300 to 1500. The Late Middle Ages followed the High Middle Ages and preceded the onset of the early modern period (and in much of Eur ...
. Large vessels were coming more and more into use and the need for additional masts to control these ships adequately grew with the increase in tonnage. Unlike in antiquity, the mizzen-mast was adopted on medieval two-masters earlier than the foremast, a process which can be traced back by pictorial evidence from
Venice Venice ( ; it, Venezia ; vec, Venesia or ) is a city in northeastern Italy and the capital of the Veneto Regions of Italy, region. It is built on a group of 118 small islands that are separated by canals and linked by over 400  ...
and
Barcelona Barcelona ( , , ) is a city on the coast of northeastern Spain. It is the capital and largest city of the autonomous community of Catalonia, as well as the second most populous municipality of Spain. With a population of 1.6 million within ci ...
to the mid-14th century. To balance out the sail plan the next obvious step was to add a mast fore of the main-mast, which first appears in a
Catalan Catalan may refer to: Catalonia From, or related to Catalonia: * Catalan language, a Romance language * Catalans, an ethnic group formed by the people from, or with origins in, Northern or southern Catalonia Places * 13178 Catalan, asteroid #1 ...
ink drawing from 1409. With the three-masted ship established, propelled by square rig and lateen, and guided by the
pintle A pintle is a pin or bolt, usually inserted into a gudgeon, which is used as part of a pivot or hinge. Other applications include pintle and lunette ring for towing, and pintle pins securing casters in furniture. Use Pintle/gudgeon sets have ma ...
-and-
gudgeon A gudgeon is a socket-like, cylindrical (i.e., ''female'') fitting attached to one component to enable a pivoting or hinging connection to a second component. The second component carries a pintle fitting, the male counterpart to the gudgeon, ...
rudder A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, aircraft, or other vehicle that moves through a fluid medium (generally aircraft, air or watercraft, water). On an aircraft the rudder is used primarily to ...
, all advanced ship design technology necessary for the great transoceanic voyages was in place by the beginning of the 15th century.


Hollow masts

The first hollow mast was fitted on the American sloop Maria in 1845, long and built of staves bound with iron hoops like a barrel. Other hollow masts were made from two tapered timbers hollowed and glued together. Nearly a century later, the simple box form of mast was arrived at.


Modern masts

Although sailing ships were superseded by engine-powered ships in the 19th century, recreational sailing ships and yachts continue to be designed and constructed. In the 1930s aluminum masts were introduced on large
J-class yacht A J-Class yacht (sometimes called a "J-boat") is a single-masted racing yacht built to the specifications of Nathanael Herreshoff's Universal Rule. The J-Class are considered the peak racers of the era when the Universal Rule determined eligibi ...
s. An aluminum mast has considerable advantages over a wooden one: it is lighter and slimmer than a wooden one of the same strength, is impervious to rot, and can be produced as a single extruded length. During the 1960s wood was eclipsed by aluminum. Aluminum alloys, generally 6000 series, are commonly utilised. Recently some sailing yachts (particularly home-built yachts) have begun to use steel masts. Whilst somewhat heavier than aluminum, steel has its own set of advantages. It is significantly cheaper, and a steel mast of an equivalent strength can be smaller in diameter than an aluminum mast, allowing less turbulence and a better airflow onto the sail. From the mid-1990s racing yachts introduced the use of
carbon fibre Carbon fiber-reinforced polymers (American English), carbon-fibre-reinforced polymers (Commonwealth English), carbon-fiber-reinforced plastics, carbon-fiber reinforced-thermoplastic (CFRP, CRP, CFRTP), also known as carbon fiber, carbon compo ...
and other
composite material A composite material (also called a composition material or shortened to composite, which is the common name) is a material which is produced from two or more constituent materials. These constituent materials have notably dissimilar chemical or ...
s to construct masts with even better strength-to-weight ratios. Carbon fibre masts could also be constructed with more precisely engineered aerodynamic profiles. Modern masts form the leading edge of a sail's
airfoil An airfoil (American English) or aerofoil (British English) is the cross-sectional shape of an object whose motion through a gas is capable of generating significant lift, such as a wing, a sail, or the blades of propeller, rotor, or turbine. ...
and tend to have a teardrop-shaped cross-section. On smaller racing yachts and catamarans, the mast rotates to the optimum angle for the sail's airfoil. If the mast has a long, thin cross-section and makes up a significant area of the airfoil, it is called a wing-mast; boats using these have a smaller sail area to compensate for the larger mast area. There are many manufacturers of modern masts for sailing yachts of all sizes, a few notable companies are Hall Spars, Offshore Spars, and Southern Spars. After the end of the
age of sail The Age of Sail is a period that lasted at the latest from the mid-16th (or mid- 15th) to the mid- 19th centuries, in which the dominance of sailing ships in global trade and warfare culminated, particularly marked by the introduction of naval ...
, warships retained masts, initially as observation posts and to observe
fall of shot Indirect fire is aiming and firing a projectile without relying on a direct line of sight between the gun and its target, as in the case of direct fire. Aiming is performed by calculating azimuth and inclination, and may include correcting aim by ...
, also holding fire control equipment such as
rangefinder A rangefinder (also rangefinding telemeter, depending on the context) is a device used to measure distances to remote objects. Originally optical devices used in surveying, they soon found applications in other fields, such as photography an ...
s, and later as a mounting point for
radar Radar is a detection system that uses radio waves to determine the distance (''ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, w ...
and
telecommunication Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. It has its origin in the desire of humans for communication over a distance greater than that fe ...
antennas, which need to be mounted high up to increase range. Simple pole,
lattice Lattice may refer to: Arts and design * Latticework, an ornamental criss-crossed framework, an arrangement of crossing laths or other thin strips of material * Lattice (music), an organized grid model of pitch ratios * Lattice (pastry), an orna ...
, and
tripod mast The tripod mast is a type of mast used on warships from the Edwardian era onwards, replacing the pole mast. Tripod masts are distinctive using two large (usually cylindrical) support columns spread out at angles to brace another (usually vertica ...
s have been used—also, on some past Japanese warships, complex
pagoda mast A pagoda mast was a type of superstructure erected on a tripod mast that was common on Japanese capital ships that were reconstructed during the 1930s in a bid to improve their fighting performance. These modifications were deemed to be necessa ...
s. File:USS Nevada 1925 SLV Green.jpg, with lattice masts File:HMS Invincible (1907) British Battleship.jpg, with tripod masts File:SMS Scharnhorst by Arthur Renard.jpg, with pole masts File:Japanese Battleship Nagato 1944.jpg, with pagoda mast


See also

*
Dismasting Dismasting, also spelled demasting, occurs to a sailing ship when one or more of the masts responsible for hoisting the sails that propel the vessel breaks. Dismasting usually occurs as the result of high winds during a storm acting upon masts, ...
* Sail-plan


References


External links


Rigging

Boatdesign
* In-Arch.net

{{Authority control Sailing rigs and rigging Windsurfing equipment Wood products History of forestry