Northrop Grumman Sperry Marine VisionMaster FT, User Manual

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Radar/Chart Radar User Guide Glossary
65900010 Glossary-11
Rhumb Line (RHL): A line on a sphere that cuts all meridians at the same
angle; the path taken by a ship or plane that maintains a constant
compass direction
RM(R): Relative Motion – Relative Trails
RM(T): Relative Motion – True Trails
ROT: Rate of Turn
Route: A set of waypoints that define the intended path of travel.
RR: Range Rings
S
S-band: The S-band, or 10 cm radar short-band, is the part of the
microwave band of the electromagnetic spectrum ranging roughly
from 1.55 to 5.2 GHz.
S57: Internationally accepted standard for electronic charts in the ENC
vector-format. ENC data is standardized according to ECDIS
specifications published in IHO Special Publication No. 57. Charts
complying with this specification are available from various
suppliers.
S57 PIN: Is used to generate a 16-character string which represents the
encrypted hardware ID portion of the S-57 User Permit.
S63 Chart permit file: A file generated by the data manufacturer that
is used, in conjunction with an S63 permit code to decrypt chart
data for a particular set of ARCS charts or S57 cells.
S63 permit code: A code that identifies a license for using S57 charts.
This is sometimes referred to as the S57 User Permit.
SAR: Search and Rescue craft (AIS nav symbol).
SART: Search and Rescue Transponder
SCAMIN: An attribute (defined by the IHO S-57 standard) that can be used
to tag ENC chart features to be suppressed above a certain display
scale.
Scanner Control Unit: A unit which switches power to the S-band Turning
Unit, under the control of the Display.
Scanner Unit: Comprises the Antenna and Turning Unit.