JRC JFE-582, Instruction Manual

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x Explanation of Terms
NMEA0183 : NMEA stands for the National Marine Electronics Association. NMEA0183 is the format used
when sending or receiving depth, position, water temperature, ship speed and other
information between marine equipment.
Bubbling : The phenomenon where the image of the seabed is interrupted due to air bubbles caused by
the ship's hull or the propeller during a voyage.
Beam angle : The angle that sound waves spread out from the transducer. Sound waves spread out in a
conical manner taking the center of the bottom surface of the transducer at the apex of the
cone.
Transducer : Device that emits ultrasonic waves in water and receives the signals reflected off the seabed.
This is equivalent to an antenna on a radio.
IMO : stands for International Maritime Organization
MED : stands for Marine Equipment Directive. This is the directive for marine equipment in Europe.
This directive unifies format approval standards implemented separately by each European
country.
UTC : stands for Universal Time Coordinated.
Explanation of Terms