Glossary
Page G-6
961 Operations and Reference Manual Rev. D
secondaries
The "slave" loran transmitters in a chain of at least three sta-
tions.
sentence
A group of data in one of several formats defined by the
National Marine Electronics Association.
SOG
S
peed
O
ver
G
round. The actual speed of your vessel relative to
the bottom of the water; that is, the speed your vessel is actu-
ally going.
SNR
S
ignal-to-
N
oise
R
atio. A guide number for determining the rel-
ative quality of GPS, DGPS, or loran signals as compared to
background radio noise.
TDs
T
ime
D
ifferences. The measured amount of time—in millionths
of a second—between those loran signals received from the
master and those from the secondary station. These measure-
ments are used to determine position, according to the
Loran-C system.
tide
The vertical rise and fall of water caused by the gravitational
pull of the moon and sun.
track
A sequence of position measurements, or a desired line of
travel, defined one second at a time; that is, defined by actu-
ally travelling from point A to point B. Your track is a continu-
ous record of everywhere your vessel has been.
trip
A sequence of waypoints, including past, active, and future
ones.
waypoint
A particular location, defined by its lat/lon, distance and bear-
ing, or Loran-C TDs, which is used as an intermediate or final
destination.
XTE
See cross-track error.
Содержание 961X
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Страница 8: ...Page viii 961 Operations and Reference Manual Rev D ...
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Страница 58: ...Chapter 2 Introducing the 961 Page 2 16 961 Operations and Reference Manual Rev D ...
Страница 140: ...Chapter 5 Understanding Position Coordinates Page 5 12 961 Operations and Reference Manual Rev D ...
Страница 172: ...Chapter 7 Creating Avoidance Points Page 7 16 961 Operations and Reference Manual Rev D ...
Страница 198: ...Chapter 8 Creating Routes Page 8 26 961 Operations and Reference Manual Rev D ...
Страница 262: ...Chapter 12 Alarms TideTrack and Currents Page 12 16 961 Operations and Reference Manual Rev D ...
Страница 348: ...Chapter 14 Service and Maintenance Functions Page 14 20 961 Operations and Reference Manual Rev D ...
Страница 374: ...Index Page I 12 961 Operations and Reference Manual Rev D ...