Magnetic compass

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Image
The magnetic compass is fitted on the upper bridge exactly center line of the ship   It is referred to as standard compass     1. D ry C ard    2. W et C ard   A compass point north because all magnets have two poles north pole, south pole.   The north pole of the one magnet attracted towards the south pole of another magnet     DRY CARD COMPASS   A light aluminum ring about 254mm in diameter is attached to a brass hub by silk cord which is threaded in and out through holes in the ring.   This tight silk cord is act like bicycle wheels.   There is no other connection or support between the ring and the hub.   Silk cord is used because it doesn’t shrink or stretch due to moisture or change in atmospheric temperature.     Card support: -     The bottom of the hub has small cap fi tt ed with a sapphire bearing surface.   This rests on a pivot tipped with iridium which is hard nonmagnetic metal....
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Long Range Identification and Tracking ( LRIT )

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 LRIT is a reporting system which is developed to enhance the safety and security of ships and also assist in search and rescue operation.

LRIT allows member state to receive position reports from vessels operating in proximity to states coastline. As it works on satellite communication , worldwide communication is possible. It has no fixed channels.

The LRIT information is not available to ships nearby. The information are available only to coastal states, flag state, search and rescue centers upon a request through a system of regional, national and International LRIT data exchange center.

credits: IMO

 

 

Details transmitted are:
  • ships identity
  • ships location
  • date and time of transmission 

LRIT system consists of:

  • communication service provider
  • application service provider
  • LRIT data centre
  • Information transmitting equipment
  • LRIT distribution plan

LRIT is an independent system and is not interfered with AIS.

Information can be received by:

  • Flag state
  • Port
  • Coastal state
  • Search and rescue centre

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Image
The magnetic compass is fitted on the upper bridge exactly center line of the ship   It is referred to as standard compass     1. D ry C ard    2. W et C ard   A compass point north because all magnets have two poles north pole, south pole.   The north pole of the one magnet attracted towards the south pole of another magnet     DRY CARD COMPASS   A light aluminum ring about 254mm in diameter is attached to a brass hub by silk cord which is threaded in and out through holes in the ring.   This tight silk cord is act like bicycle wheels.   There is no other connection or support between the ring and the hub.   Silk cord is used because it doesn’t shrink or stretch due to moisture or change in atmospheric temperature.     Card support: -     The bottom of the hub has small cap fi tt ed with a sapphire bearing surface.   This rests on a pivot tipped with iridium which is hard nonmagnetic metal....
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