1-1 Chapter 1 Outline of the Equipment
1
Chapter 1 General
1.1 Functions
JLN-720 satellite log is equipment that receiving signals from GPS satellites by GPS compass sensor
mounted on board, and then measures speeds over the ground (SOG) based on the signal.
This equipment can measure and display the triaxial vessel speed, which are ahead/stern vessel speed,
bow starboard/port speed, and stern starboard/port speed. The ahead/stern vessel speed is measured
combining with Gyro, the bow starboard/port speed and the stern starboard/port speed is measured
combing with rate of turn Gyro (ROT).
This equipment also measures and records the vessel distance.
The JLN-720 satellite log conforms to the International Maritime Organization (IMO) performance
standards, provides accurate displays of ship’s speed over a wide range from dead slow to maximum.
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