Bridge Equipment

Bridge Equipments –

The bridge of a vessel has following Equipments,

  1. Steering wheel
  2. Gyro repeater
  3. Magnetic compass reflector
  4. Telegraph
  5. Radar
  6. ARPA
  7. SART
  8. VHF
  9. Clear View Screen
  10. Anemometer
  11. Tachometer
  12. Rudder Angle Indicator
  13. EPIRB
  14. Alarm panel
  15. GPS
  16. Aneroid Barometer
  17. Inclinometer
  18. Navtex
  19. Fire detector
  20. general alarm
  21. Echo sounder
  22. Course recorder
  23. Public Address System

TELEGRAPH is used for communication of engine movements between bridge and engine room. Most modern ships have telegraph which are electronically operated they continue to bring after an order has been made until the receipt of proper reply the engine room telegraph must be tested before leaving and entering port.

GYROREPEATER- Gyro compass is used on all vessels for determining the true course of the ship the gyro compass has a repeater in each bridge wing for observing the heading of the ship and taking bearings.

ANEROID BAROMETER this instrument source atmospheric pressure in inch or millibars.

AUTOPILOT in this mode the vessel steers without the need of helmsman . course can be altered by training the autopilot knob . if the course steered goes off by a present value the ofcourse alarm will activate generally used in open seas and areas of reduced traffic congestion.

ARPA– Automatic Recorder Plotting aid in its simplest form is used to calculate the course and the speed of the target vessel and the time and range of the closest point of approach 

RADAR – An electromagnetic instrument that can scan the horizon with the aid of a scanner and reproduces all the reflected electromagnetic pulse on a display screen. The radar display can be set on short rangers such as 0.5, 1, 3, 6, 9, 12 miles or on long rangers such as 24 ,48 miles. All echoes of the target and land within the range in use is marked on the screen. In restricted visibility, it plays a vital role in the safe navigation of the ship.

VHF– VHF is a GMDSS equipment that is used to communicate between ships or ship and shore. It uses very high frequency for communication. Even we have portable VHF onboard that we take with us when we abandon ship.

ANEMOMETER an instrument that shows wind direction and speed. The display is located on the bridge showing wind speed in knots and metres per second.

The rudder angle indicator is an instrument that shows the angle of radar.

TACHOMETER (RPM indicator) A meter that indicates the revolution per minute of the propeller.

NAVTEX -like a radio station this machine broadcasts in printed text various information about navigational assistance, danger, distress and the weather etc.

CHRONOMETER super clock that shows Greenwich mean time upon which all the navigational calculations are made.

COURSE RECORDER this is a graphical monitor/ printout, recording the various quotes stated by the safe around the clock for every full passage from departure port to arrival at the next port.

ELECTROMAGNETIC LOG – an instrument to record the distance travelled by the ship between any two points on passage between ports usually from departure to arrival port.

AIS– automatic identification system is an aid to identify details such as name, port of registration, MMSI number, course and speed etc of approaching vessel.

EPIRB– emergency position indicating radio beacon used for sending automatic distress signal to costal stations via satellite.

SART – search and rescue transponder used to send distress to vessels within radar vicinity. the blips from the SART are display on the 3CM radar of the approaching vessel.

CLEAR VIEW ROTATING SCREEN which reflects the water falling on the window to improve visibility.

 Read the following in detail