82694_
Op&Ins MAN_RA2500_D 5
MMI
Man Machine Interface
NMEA
National Marine Electronics Association. The NMEA electronics interface specifications have been developed under
the auspices of the Association. The NMEA 0183 is an internationally recognized specification for interfacing marine
electronics. NMEA 0183 version 2.3 is identical to lEC 61162-1.
POLLED MODE
A transponder is in a polled mode during a request-response session only. Distinguish this from a station, which is
polled into certain slots. This station is first polled and then enters assigned mode.
POSITION UPDATE
The redefining of position by analysis of satellite orbital data as referenced to time.
PROCESSOR
The processor circuit card in the console that controls system operations and computes the positioning/navigation
solutions.
PROMPT
A message on the display instructing the operator to make a keyboard entry.
PSS
Physical AIS Shore Station. The PSS is the most basic AIS-related entry, which can exist on its own in a real physical
environment, as opposed to an AIS base station or AIS repeater station.
PULSE SPEED SENSOR
Speed log whose speed output signal is defined by a pulse mte output.
RATDMA
Random Access Time Division Multiple Access -Access protocol for transmissions which have not been pre-
announced. This is used for the first transmission during data link network entry or for messages of non-repeatable
character.
REFERENCE COMPASS
The compass against which the steering compass (see STEERING COMPASS) may be calibrated.
REFERENCE ELLIPSOID
A mathematical description of the Earth's ellipsoidal shape (see ELLIPSOID), which is the reference frame for
positioning computation.
RESET
To return stored values to either the default value or zero in memory.
RMS
See ROOT MEAN SQUARED.
ROOT MEAN SQUARED (RMS)
A statistical measure of probability, stating that an expected event
will happen 68% of the time. In terms of position update accuracy, 68 position updates out of 100 will be accurate to
within specified system accuracy.
SENSOR
A device that detects a change in a physical stimulus and turns it into a signal that can be measured.
Summary of Contents for RA-2500
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Page 52: ...82693_Op Ins MAN_TR2500_D 10 1 10 OUTLINE DRAWINGS 10 1 TR 2500 AIS Transponder...
Page 53: ...82694_Op Ins MAN_RA2500_D 10 2 10 2 Procom CXL 2 1 l Maritime VHF Antenna with FLG Bracket...
Page 54: ...82694_Op Ins MAN_RA2500_D 10 3 10 3 Procom GPS 4 Antenna...
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