Specifications

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RMS ROOT MEAN SQUARED – 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.
ROT Rate Of Turn
RNG Range
RX RX is the telegraph and radio abbreviation for “receive”
SAR Search And Rescue
SNR Signal-to-Noise ratio (SIN). Is the quantitative relationship between the useful and non-
useful part of the received satellite signal. A high SIN indicates a good receiving
condition.
SOG Speed Over Ground – Speed in relation to the seabed.
SOTMA Self Organized Time Division Multiple Access -An access protocol, which allows
autonomous operation on a data link while automatically resolve transmission conflicts.
TCP Transmission Control Protocol – Provides a reliable byte-stream transfer service between
two end points on an internet. TCP depends on IP to move packets around the network on
its behalf.
TCP/IP TCP/IP is a name given to the collection (or suite) of networking protocols that have been
used to construct the global Internet. The protocols are also referred to as the DoD (dee-
oh-dee) or Arpanet protocol suite because their early development was funded by the
Advanced Research Projects Agency (ARPA) of the US Department of Defense (DoD).
TCPA Time to Closest Point of Approach
TI Turn Indicator
TNC Threaded Neill-Concelman connector – common type of RF connector used for coaxial
cable
TX TX is the telegraph and radio abbreviation for “transmit”
UDP User Datagram Protocol – Provides a packetized data transfer service between end points
on an internet. UDP depends on IP to move packets around the network on its behalf.
UTC Universal Time Coordinated – Greenwich mean time corrected for polar motion of the
Earth and seasonal variation in the Earth's rotation.
VDC Volt DC
VDL VHF Data Link
VHF Very High Frequency – A set of frequencies in the MHz region
VSWR Voltage standing wave ratio