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Navigation

Navigation ESWS

QuestionAnswer
What is dead reckoning Provides and estimated without the effects of the winds and seas. There are six rules.
Radio navigation Using radio waves to determine the ships position (GPS).
Describe the purpose of Range marker Method of checking a gyrocompass. it is also possible to mark range as it passes down the port or starboard side of the ship.
Define Advance The distance the vessel moves along its original course from the time the rudder is put over until the new course is achieved.
Define transfer The distance the vessel moves perpendicular to the original course during the turn.
Pivot point A point on the center line about which the ship turns when the rudder is put over.
Acceleration/decelaration Another part of the tactical data folder, a ship increase and decrease.
True bearing The direction of an object in 360 degree circle relative to true north.
Relative bearing Is measured relative to the ships bow from 000 (dead ahead ) clockwise through 360 degree.
DIW dead in water This is when the ship is not making way under her own power.
Head on When two ships meet head on, or nearly head on,each ship must change course to starboard and pass port to port.
Crossing When two power driven vessels are crossing and involve risk of collision, the vessel having the other to starboard must keep out of the way and will avoid usually by turning to starboard ad passing astern of the other vessel.
Over taking An over taking vessel is one that is approaching another vessel from any direction more than 22.5 degrees abaft its beam.
Stand on Where one of two vessels is to keep out of the way the other shall keep her course and speed.
Give way. Every vessel which is directed to keep out of the way of another vessel shall, so far as possible, take early substantial action to keep well clear.
Collision When 2 or more ships collide with one another .
Allison The act of striking of a moving vessel against a stationary object .
Aground When a ship is resting or lodge on the sea bottom.
Stadimeter An instrument for determining the distance to an object by using its known height
Sextant An instrument for measuring angles, primary altitudes of celestial bodies
Bearing Circle A ring designed to fit snugly over a compass or compass repeater, and provided with vanes for observing compass bearings.
Telescope alidade A bearing circle fitted with telescope to facilitate observation or bearings.
Parallel Motion Protractor (PMP) An instrument consisting of protractor and one or more arms attached to a parallel motion device, so that the movement of the arms is everywhere parallel.
Parallel rulers An instrument for transferring a line parallel to itself.
Chart A map or geospatial database intended primarily for navigation of aircraft or vessels.
Gyrocompass A compass having one or more Gyroscope as the directive element, and which is north seeking
What kind of Gyrocompass we use on board WSN-2 and the MK-27
Magnetic Compass A compass that seeks Magnetic North.
What kind of Compass do we use onboard Onboard we use the digital flux Gate.
Radar A radio system which measures distance and usually.
What type of Radar do we use for Navigation We use the SPS-73.
Fathometer A echo sounder that measures the water beneath the keel using.
Satellite Navigation (SATNAV) A system of satellites that provides time- referenced position information, and used to calculate the position of the receiver in latitude, longitude, and elevation.
Global Positioning System (GPS)- Provides highly accurate position and speed information in three dimensions, it is unaffected by weather. Onboard we use the WRN-6 and DAGR.
Laser Range Finder An electronic instrument used to find the distance between the reference point and another object.
Integrated Bridge System Integrated systems take inputs from various ship sensors, electronically and automatically chart the position, and provide control signals required to maintain a vessel on a preset course.
Created by: Alex1008
 

 



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