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EDIT
modify
display data via
To
existing
ELEVATION ANGLE
The angle made b y the line-of-sight range t o the satellite and the horizontal
lite is overhead and
Satellites whose elevation angle is less than
for providing an accurate position (latitude and longitude) update.
ENTER
To store data in the memory of the navigator.
ETA
Estimated
of Arrival. Calculated on basis
Time
and
the actual (present) speed.
FILTER TIME
If the GPS signals are distorted
will be unstable, especially at
the readings y o u can activate the FILTER TIME feature.
TIME
With FILTER
set
adjusted
yachting purposes.
to
needed. The averaging time
optimal value depends on the characteristics
needs. 10 minutes may be a good starting point.
FUN CTI 0
N
A specific operational capability of the navigator.
GLOBAL POSiTlONING SYSTEM, GPS
The NAVSTAR Global Positioning System which consists o f orbiting satellites,
a network of ground control stations, and user positioning and navigation
equipment. When
satellites in six orbital planes about 20,200 kilometres above the earth.
GREAT CIRCLE NAVlGATlON
that it brings
the shortest way through the sailplan. The disadvantage is
you
that a Great Circle track may differ from the straight
a
Mercator projected chart. Great Circle navigation is recommended
drawn o n
for ocean voyages only. The advantage increases by higher latitude (north
south). It is biggest on an east/west course
Of Precision. An indicator of the t w o dimensional accuracy
in p ~ ~ i t ~ ~ n
e and ~ o n g i ~ ~ ~ e ~ .
Electronic circuits that permit the passage of data between different types
devices.
LATITUDE
keyboard.
the
degrees when the satellite first appears on the horizon.
Selective Availability
by
to 0 (zero) minutes the navigator
With S/A
can
be increased to 1 through 19 minutes. The
operational, the system will have 21 plus
Converted t o metres
3
degrees are not good candidates
distance to
of t h e
low
speeds. In order to smoothen
will
have the dynamics
active additional filtering may be
of
the S / A and your navigational
rhumb
line
zero on a north/south course.
is
theoretically
it
destination
t h e
and
3
active spare
that is
easily
or
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