The interior of the bridge of the Sikuliaq'',_docked_in_Ketchikan,_Alaska.html" ;"title="RV_Sikuliaq.html" ;"title="Research Vessel ''RV Sikuliaq">Sikuliaq'', docked in Ketchikan, Alaska">RV_Sikuliaq.html" ;"title="Research Vessel ''RV Sikuliaq">Sikuliaq'', docked in Ketchikan, Alaska file:Wheelhouse of Leao Dos Mares.jpg, Wheelhouse on a tugboat, topped with a flying bridge The bridge, also known as the pilothouse or wheelhouse, is a room or platform of a

ship 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 ...

from which the ship can be commanded. When a ship is under way, the bridge is manned by an

officer of the watch Watchkeeping or watchstanding is the assignment of sailors to specific roles on a ship to operate it continuously. These assignments, also known at sea as ''watches'', are constantly active as they are considered essential to the safe operation o ...

aided usually by an

able seaman An able seaman (AB) is a seaman and member of the deck department of a merchant ship with more than two years' experience at sea and considered "well acquainted with his duty". An AB may work as a watchstander, a day worker, or a combination o ...

acting as a

lookout A lookout or look-out is a person in charge of the observation of hazards. The term originally comes from a naval background, where lookouts would watch for other ships, land, and various dangers. The term has now passed into wider parlance. ...

. During critical maneuvers the captain will be on the bridge, often supported by an officer of the watch, an able seaman on the wheel and sometimes a

pilot An aircraft pilot or aviator is a person who controls the flight of an aircraft by operating its directional flight controls. Some other aircrew members, such as navigators or flight engineers, are also considered aviators, because they a ...

, if required.

History and etymology

The compass platform of a British destroyer in the Battle_of_the_Atlantic_during_the_Second_World_War_with_central_binnacle.html" ;"title="Second_World_War.html" ;"title="Battle of the Atlantic during the Second World War">Battle of the Atlantic during the Second World War with central binnacle">Second_World_War.html" ;"title="Battle of the Atlantic during the Second World War">Battle of the Atlantic during the Second World War with central binnacle and the voice pipes to belowdecks There are many terms for parts of a ship with functions similar to a bridge. Depending upon the design and layout of a ship, some of these terms may be interchangeable. Traditionally,

sailing ship 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 ...

s were commanded from the quarterdeck, aft of the

mainmast 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 lig ...

, where the

ship's wheel A ship's wheel or boat's wheel is a device used aboard a water vessel to steer that vessel and control its course. Together with the rest of the steering mechanism, it forms part of the helm. It is connected to a mechanical, electric servo, or ...

was located (as it was close to the

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 air or water). On an aircraft the rudder is used primarily to counter adve ...

). A ''wheelhouse'' was a small enclosure around the

on the quarter deck of

s. On modern ships the ''wheelhouse'' or ''pilothouse'' refers to the bridge of smaller motor vessels, such as tugs. With the arrival of

paddle steamer A paddle steamer is a steamship or steamboat powered by a steam engine that drives paddle wheels to propel the craft through the water. In antiquity, paddle wheelers followed the development of poles, oars and sails, where the first uses we ...

s, engineers required a platform from which they could inspect the paddle wheels and where the captain's view would not be obstructed by the paddle houses. A raised walkway, literally a bridge, connecting the paddle houses was therefore provided. When the

screw propeller A propeller (colloquially often called a screw if on a ship or an airscrew if on an aircraft) is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral which, when rotated, exerts linear thrust upon ...

superseded the paddle wheel, the term "bridge" survived. Traditionally, commands would be passed from the senior officer on the bridge to stations dispersed throughout the ship, where physical control of the ship was exercised, as technology did not exist for the remote control of steering or machinery.

Helm Helm may refer to: Common meanings * a ship's steering mechanism; see tiller and ship's wheel * another term for helmsman * an archaic term for a helmet, used as armor Arts and entertainment * Matt Helm, a character created by Donald Hamilton * ...

orders would be passed to an enclosed wheel house, where the

coxswain The coxswain ( , or ) is the person in charge of a boat, particularly its navigation and steering. The etymology of the word gives a literal meaning of "boat servant" since it comes from ''cock'', referring to the cockboat, a type of ship's boa ...

helmsman A helmsman or helm (sometimes driver) is a person who steers a ship, sailboat, submarine, other type of maritime vessel, or spacecraft. The rank and seniority of the helmsman may vary: on small vessels such as fishing vessels and yachts, the fu ...

operated the

. Engine commands would be relayed to the

engine officer An engineering officer or simply engineer, is a licensed mariner qualified and responsible for operating and maintaining the propulsion plants and support systems for a watercraft and its crew, passengers and cargo.Wise Geek''What is the Engine ...

in the

engine room On a ship, the engine room (ER) is the compartment where the machinery for marine propulsion is located. To increase a vessel's safety and chances of surviving damage, the machinery necessary for the ship's operation may be segregated into var ...

by an

engine order telegraph An engine order telegraph or E.O.T., also referred to as a Chadburn, is a communications device used on a ship (or submarine) for the pilot on the bridge to order engineers in the engine room to power the vessel at a certain desired speed. C ...

that displayed the captain's orders on a dial. The engine officer would ensure that the correct combination of steam pressure and engine revolutions were applied. Weatherproof pilot houses supplanted open bridges so that the

, who was traditionally the ship's navigating officer, could issue commands from shelter.

Iron Iron () is a chemical element with Symbol (chemistry), symbol Fe (from la, Wikt:ferrum, ferrum) and atomic number 26. It is a metal that belongs to the first transition series and group 8 element, group 8 of the periodic table. It is, Abundanc ...

, and later steel, ships also required a ''compass platform''. This was usually a tower, where a

magnetic compass A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with ...

could be sited far away as possible from the

ferrous In chemistry, the adjective Ferrous indicates a compound that contains iron(II), meaning iron in its +2 oxidation state, possibly as the divalent cation Fe2+. It is opposed to " ferric" or iron(III), meaning iron in its +3 oxidation state, suc ...

interference of the hulk of the ship. Many ships still have a ''flying bridge'', a platform atop the pilot house, open to weather, containing a

binnacle A binnacle is a waist-high case or stand on the deck of a ship, generally mounted in front of the helmsman, in which navigational instruments are placed for easy and quick reference as well as to protect the delicate instruments. Its traditional ...

and voice tubes to allow the conning officer to direct the ship from a higher position during fair weather conditions. Larger

warship A warship or combatant ship is a naval ship that is built and primarily intended for naval warfare. Usually they belong to the armed forces of a state. As well as being armed, warships are designed to withstand damage and are usually faster ...

s may have ''navigation bridge'', which is used for the actual conning of the ship, and a separate ''admiral's bridge'' can be provided in flagships, where the admiral can exercise control over the squadron of ships without interfering with the captain's command of the vessel. In older warships, a heavily armored conning tower was often provided, where the vital command staff could be located under protection to ensure that the ship could be commanded under fire. On a submarine, the bridge is the highest point on the conning tower, to provide for better visual navigation when on the surface. They became standard on

United States Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...

submarines after 1917, greatly improving the function of the vessels while at the surface.

Configuration

upThe RMS ''Queen Mary 2'', showing bridge with enclosed bridge wings that permit a view along both sides of the vessel Modern advances in remote control equipment have seen progressive transfer of the actual control of the ship to the bridge. The wheel and

throttle A throttle is the mechanism by which fluid flow is managed by constriction or obstruction. An engine's power can be increased or decreased by the restriction of inlet gases (by the use of a throttle), but usually decreased. The term ''throttle'' ...

s can be operated directly from the bridge, controlling often-unmanned machinery spaces. Aboard modern warships, navigational command comes from the bridge, whereas electronically directed weapon systems are usually controlled from an interior compartment. On a commercial vessel, the bridge will contain the

equipment Equipment most commonly refers to a set of tool A tool is an object that can extend an individual's ability to modify features of the surrounding environment or help them accomplish a particular task. Although many animals use simple tools, onl ...

necessary to safely navigate a vessel on passage. Such equipment will vary with ship type, but generally includes a

GPS navigation device A satellite navigation device (satnav device) is a user equipment that uses one or more of several global navigation satellite systems (GNSS) to calculate the device's geographical position and provide navigational advice. Depending on the ...

, a

Navtex NAVTEX (NAVigational TEleX), sometimes styled Navtex or NavTex, is an international automated medium frequency direct-printing service for delivery of navigational and meteorological warnings and forecasts, as well as urgent maritime safety inf ...

receiver, an ECDIS or chart system, one or more

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, we ...

s, a communications system (including distress calling equipment), engine (

telegraph Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas p ...

) controls, a wheel/autopilot system, a magnetic compass (for redundancy and cross check capability) and light/sound signalling devices.

Navigation station

Navigation station on a ship The navigation station of a ship may be located on the bridge or in a separate chart room, nearby. It includes a table sized for

nautical chart A nautical chart is a graphic representation of a sea area and adjacent coastal regions. Depending on the scale of the chart, it may show depths of water and heights of land ( topographic map), natural features of the seabed, details of the co ...

s where calculations of course and

location In geography, location or place are used to denote a region (point, line, or area) on Earth's surface or elsewhere. The term ''location'' generally implies a higher degree of certainty than ''place'', the latter often indicating an entity with an ...

are made. The navigator plots the course to be followed by the ship on these charts. Besides the

desk A desk or bureau is a piece of furniture with a flat table-style work surface used in a school, office, home or the like for academic, professional or domestic activities such as reading, writing, or using equipment such as a computer. Desks of ...

and the navigation charts, the area contains

navigational instrument Navigational instruments are instruments used by nautical navigators and pilots as tools of their trade. The purpose of navigation is to ascertain the present position and to determine the speed, direction, etc. to arrive at the port or point o ...

s that may include

electronic equipment The field of electronics is a branch of physics and electrical engineering that deals with the emission, behaviour and effects of electrons using electronic devices. Electronics uses active devices to control electron flow by amplification ...

for a

Global Positioning System The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite sy ...

receiver and chart display,

fathometer Echo sounding or depth sounding is the use of sonar for ranging, normally to determine the depth of water (bathymetry). It involves transmitting acoustic waves into water and recording the time interval between emission and return of a pulse; ...

, a

compass A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself wit ...

, a

marine chronometer A marine chronometer is a precision timepiece that is carried on a ship and employed in the determination of the ship's position by celestial navigation. It is used to determine longitude by comparing Greenwich Mean Time (GMT), or in the modern ...

two-way radio A two-way radio is a radio that can both transmit and receive radio waves (a transceiver), unlike a broadcast receiver which only receives content. It is an audio (sound) transceiver, a transmitter and receiver in one unit, used for bidirection ...

s, and radiotelephone, etc.

Flying bridge

A flying bridge is an open area on top of a surface ship that provides unobstructed views of the fore, aft, and the sides of a vessel, and that serves as an operating station for the ship's officers, such as the captain or

. Prior to World War II, virtually every

, steamship,

monitor Monitor or monitor may refer to: Places * Monitor, Alberta * Monitor, Indiana, town in the United States * Monitor, Kentucky * Monitor, Oregon, unincorporated community in the United States * Monitor, Washington * Monitor, Logan County, West ...

, or large pleasure ship had a flying bridge above the main bridge. Flying bridges were generally not enclosed at all (although sometimes they were partially enclosed), and often had little equipment—usually just a speaking tube or telephone to allow communication with the helmsman or wheelman on the main bridge. On military warships after 1914, the flying bridge was usually the station for the air defense officer and the gunnery officer. The amount of equipment on a flying bridge varies widely with the need of the captain. During World War II, for example, American submarine chaser surface ships had a well-outfitted flying bridge which usually contained a pelorus, signal lamps,

telescope A telescope is a device used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation. Originally meaning only an optical instrument using lenses, curved mirrors, or a combination of both to observ ...

, and voice tube to permit the captain to command the ship. U.S. Navy

attack transport Attack transport is a United States Navy ship classification for a variant of ocean-going troopship adapted to transporting invasion forces ashore. Unlike standard troopships – often drafted from the merchant fleet – that rely on ...

ships could be outfitted with either 20mm or 40mm automatic cannons on their flying bridges. Flying bridges were almost always the highest bridge on the ship. They usually were above the flag bridge (also known as the "admiral's bridge"–a bridge above the main bridge on a command warship where a high-ranking officer such as an admiral could conduct fleet operations, plan strategy, and conduct large battles) and the main bridge. Since the 1980s, large pleasure craft may have a flying bridge toward the stern that is used as additional outdoor seating space and a place to store a tender. On the smallest surface vessels, such as a sport fishing boat, the flying bridge may have controls permitting the ship to be piloted from the flying bridge, but will lack the full range of controls of the pilot house. On larger small vessels, the flying bridge may actually be enclosed, in which case it is more properly called an "upper pilot house" or "upper bridge".

Bridge wing

The bridge wing of the while in use Some flying bridges have "bridge wings", open areas which thrust outward from the flying bridge over the sides of the vessel by approximately to allow an officer to see the side of their ship while docking or working with smaller vessels. A bridge wing is a narrow walkway extending from both sides of a pilothouse to the full width of a ship or slightly beyond, to allow bridge personnel a full view to aid in the maneuvering of the ship.

Officers An officer is a person who has a position of authority in a hierarchical organization. The term derives from Old French ''oficier'' "officer, official" (early 14c., Modern French ''officier''), from Medieval Latin ''officiarius'' "an officer," f ...

use bridge wings when docking or maneuvering in

locks Lock(s) may refer to: Common meanings *Lock and key, a mechanical device used to secure items of importance *Lock (water navigation), a device for boats to transit between different levels of water, as in a canal Arts and entertainment * ''Lock ...

and narrow

waterway A waterway is any navigable body of water. Broad distinctions are useful to avoid ambiguity, and disambiguation will be of varying importance depending on the nuance of the equivalent word in other languages. A first distinction is necessary b ...

s. Each bridge wing may be equipped with a console controlling the

bow thruster Manoeuvering thruster (bow thruster or stern thruster) is a transversal propulsion device built into, or mounted to, either the bow or stern, of a ship or boat to make it more manoeuvrable. Bow thrusters make docking easier, since they allow th ...

, stern thruster, rudder and engines.

References

External links

Video clips of (nautical) bridges aboard various ships
{{Authority control Ship compartments Marine propulsion