Version 3.0
257
Glossary
Operator’s Manual
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.
ROUTE
A route is a sequential list of waypoints describing a planned voy-
age. The active route is the route used for the actual navigation of
the vessel.
RTCM
Radio Technical Commission for Maritime Services.
S/A
See SELECTIVE AVAILABILITY
SATELLITE HEALTH
Go or no-go message for each satellite included in the almanac
data. The message states whether or not the measurements from
those particular satellites can be relied upon for accurate results.
SATELLITE SIGNAL
Transmitted electromagnetic energy from a GPS satellite whose
time of arrival is measured by the navigator to calculate the posi-
tion of the navigator antenna.
SELECTIVE AVAILABILITY (S/A)
A system whereby the accuracy of GPS is reduced. S/A is con-
trolled by the U.S. Department of Defense.
SEMIMINOR AXIS
The distance from the center of the earth’s ellipse to the ellipse
surface as measured along the polar axis. It is identified symboli-
cally with the letter B, and it varies according to the reference da-
tum used for position coordinates.
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 MX500
Page 1: ...oOperator s Installation Manual MX500 Navigation System ...
Page 14: ...Version 3 0 ix Table of Contents Operator s Manual ...
Page 165: ...Version 3 0 151 Configuration Operator s Manual ...
Page 167: ...Version 3 0 153 Datum List Operator s Manual ...
Page 195: ...List of Components Installation Manual Version 3 0 181 APPENDIX F INSTALLATION SECTION ...
Page 196: ...Installation Manual List of Components 182 Version 3 0 SECTION 1 LIST OF COMPONENTS ...
Page 219: ...Installation Notes Version 3 0 205 Installation Manual SECTION 5 INSTALLATION NOTES ...
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