S57
The standard vector format for official ENC charts, stated in the International Hydrographic
Organization (IHO) Special Publication S-57.
S63
The International Hydrographic Organization standard for encrypting and securing electronic
navigational chart data.
S64
The International Hydrographic Organization test data set for chart data presentation.
SART
Search And Rescue Radar Transponder.
SI80
Signal Interface unit used for expanding the number of interface channels to the system.
Sleeping targets
Reported targets provided by the AIS can be filtered according to user-defined settings
based on range from own vessel. Targets may be sleeping, or may be activated. An AIS
“sleeping target” symbol can be visible or hidden to reduce chart clutter. Additional
information is presented when the target is activated.
SOG
Speed Over Ground. The actual speed of the vessel relative to the ocean floor.
SOLAS
SOLAS is the IMO convention to ensure Safety Of Life At Sea.
SPD
Speed.
STW
Speed Through Water
TCPA
Time in minutes to Closest Point of Approach for the ARPA target before an alarm is
activated.
TTA
Time to go from the current position to the end of the route using the route's planned
speed.
TTG
Time to go from the current position to the next wheel-over line using the route's planned
speed.
USB
Universal Serial Bus.
User permit code
A code automatically generated in the E5000 computer. This code is specific for each E5000
computer.
VRM
Variable Range Marker.
XTD
Cross Track Distance.
Terms and abbreviations| E50xx ECDIS Operator Manual
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