958 Operator’s Manual, Rev. A
Page 209
secondaries
The “slave” loran transmitters in a chain of at least three
stations.
SNR
S
ignal-to-
N
oise
R
atio. Guide number for determining the
relative quality of GPS, DGPS, or loran signals as compared to
background radio “noise.”
SOG
S
peed
O
ver
G
round. The actual speed of your vessel relative to
the sea bottom.
TD
Time Difference. The measured amount of time—in millionths
of a second—between loran signals received from the master
and the secondary stations.
target
Boats or ships, navigational markers, land masses, or any other
object detected by radar.
track
A desired line of travel, or path already travelled.
VRM
V
ariable
R
ange
M
arker. A circle on the radar, surrounding one
of the end points of the electronic bearing line, used to
measure distances from that end point to any other point of
interest on the screen.
WAAS
W
ide
A
rea
A
ugmentation
S
ystem.
waypoint
A particular location (defined for navigation purposes by its
lat/lon, distance and bearing, or TDs), used as an intermediate
or final destination.
Summary of Contents for 958
Page 1: ...NORTHSTAR 958 Integrated Navigation System Operator s Manual P N GM958UM Revision A ...
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Page 8: ...Page iv 958 Operator s Manual Rev A ...
Page 26: ...Page 18 958 Operator s Manual Rev A Chapter 1 Getting Started ...
Page 128: ...Page 120 958 Operator s Manual Rev A Chapter 8 Understanding Waypoint Route Navigation ...
Page 150: ...Page 142 958 Operator s Manual Rev A Chapter 10 Understanding Radar Functions ...
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