Navigational Equipment

All Navigational Equipment, GPS, RADAR, AIS, LRIT, Sextant, VDR, S-VDR, Gyro Compass, Magnetic Compass, Auto Pilot, Course Recorder, Doppler log, EM Log, Echo Sounder

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Auto Pilot- Working, Use, Advantages, Limitations, Tests

What is Auto Pilot? The autopilot is equipment used to maintain the ship’s set course electronically and electrically for a long period of time when alteration of course is not required. The Auto Pilot is used when a ship has to steer a set course for a long time without alteration. This is achieved by …

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IMO Performance Standards for Auto Pilot (Heading Control Systems)

Objectives Within limits related to the ships’s manoeuvrability the heading control system, in conjunction with its source of heading information, should enable a ship to keep a preset heading with minimum operation of the ship’s steering gear. A heading control system may work together with a track control system adjusting its heading for drift. A …

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Errors Of GPS

Factors affect the accuracy of GPS positions (GPS Errors) Atmospheric Error Changing atmospheric conditions change the speed of the GPS signals as they pass through the Earth’s atmosphere and this affects the time difference measurement and the fix will not be accurate. Each satellite transmits its message on two frequencies and hence a dual frequency …

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Errors of Echo Sounder

Pythagoras Error This error is found when two transducers are used, one for transmission and the other one for reception. This error is calculated using the Pythagoras principle. This error becomes prominent whenever distance between two transducer is more than 2 mtrs, manual should be referred in order to use the table for corrections. Multiple …

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Performance Standards for Devices to Measure and Indicate Speed and Distance (Speed Log)

SOLAS Requirements of Devices to Measure and Indicate Speed and Distance SOLAS requires all ships of 50,000 GRT and above to be fitted with a speed and distance measuring device fulfilling SOLAS regulation V/19.2.3.4 and, in addition, a speed and distance measuring device fulfilling regulation V/19.2.9.2. Performance Standards for Devices to indicate Speed and Distance: …

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What to do in case of Gyro Failure

Gyro Compass is a mechanical device. With time they tend to fail. If such failure happens during navigation, pilotage, entering or leaving a port or in TSS, then following steps to be taken to avoid incidents. As per SOLAS Chp V, Regulation 19.2.5, A Gyro Compass or other means are required, to determine and display …

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Must know IMO Performance Standards RADAR

RADAR is an integral part of Navigational Equipment. And a piece of most used equipment used at the bridge. With proper use, RADAR is the best tool to avoid the collision. SOLAS Requirements for RADAR: Chp. V/ Reg 19.2.3 of SOLAS: – All ships of 300 GRT and upwards and passenger ships irrespective of size …

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IMO Performance Standards for Echo Sounder

As per Chp V/ Reg 19.2.3 of SOLAS 73/78, An Echo Sounder is required onboard ship which should provide reliable information on the depth of water under a ship to help in navigation. SOLAS Chp V/ Reg 19.23: All ships of 300 GRT and above and passenger ships irrespective of size shall, in addition to …

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IMO Performance Standards of ARPA

Performance Standards of ARPA 1. Detection: If a separate facility is provided for the detection of targets, other than by the Radar, its performance should not be inferior to that which could be obtained by the use of the radar display. 2. Acquisition: Target acquisition may be manual or automatic for relative speeds up to …

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GPS (Global Positioning System)- Definition, Requirement, Principle, Working, Errors Explained

Definition GPS is a satellite navigational system, funded and controlled by the US Department of Defence. GPS is a ground based satellite navigational system that provides location and time information in all weather condition and anywhere on the Earth. It was made by the US Government for their military use and later on it was …

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