AUTOMATIC and MANUAL MODES "PHI" appear. RALT appear if the
unit is in the alternate mode. Fix
The Z-9500's Loran has both automatic and manual modes. This
means the unit will select the stations to use when it's in automatic. You
must select the stations when ifs in the manual mode.
The Z-9500 chooses the stations with the best crossing angles and
signal strengths when it's in the automatic mode. It does this by
continually monitoring the stations signals to determine the best ones to
use. If
the unit determines one or more stations are better to use than
the current
ones, it will automatically switch to the new stations.
However, there are times when you don't want the unit to switch sta-
tions. When you're navigating using waypoints is one. You must use
the same stations when
travelling to a
waypoint
as the ones used when
the
waypoint was saved. For
example, if the
bran
was using M,X, and
Y when the
waypoint
was saved, you must use M,X, and V to navigate
back to that waypoint. Otherwise, navigation errors can occur. Placing
the unit in the manual mode keeps the Z-9500 from
changing stations.
quality
is a measure of the lines of
position's crossing angles. If the I ix
quality is poor, use the displayed information with caution. The dis-
played position
can and will vary
with poor crossing angles. The
posi-
tion display
flashes the last known latitude/longitude position
when the
fix
quality
is not usable. A number to the
right
of the
fix
quality message
shows the fix quality's
value. It's range is from zero (0)
to nine (9), with
zero the worst and nine the best.
Remember,
do not use the loran for
navigation when the
position
display
flashes! Find and correct the problem before
navigating with
the unit.
To place
the Z-9500 in the manual mode,
simply press
the AUTO key.
The word
"MAN"
appears
at the bottom of the
position
screen, showing
which mode is in use.
Although you can switch from automatic to manual at any time, you
cani always switch to automatic. The Z-9500 must be using the pre-
ferred GRI for yoUr area in order to use the automatic mode. If
you try
switching from manual to automatic while a non-preferred GRI is in use,
the Z-9500
will simply
switch back to the manual mode. (A preferred
GRI is one the Z-9500 determines is the best one to use based on your
location.) If you are in a location that is covered
by multiple GRI5, you
won't know which one is the preferred one. However, if the Z-9500
won't let you switch into automatic, you can be certain that you're not
using
the
preferred GRI.
PRIMARY and ALTERNATE SOLUTIONS
The bran normally
determines its position by measuring the time differ-
ence between the master and two other
secondary
stations. Each time
difference results in a line of position. Your present position is the
intersection of the lines of position. This is called a "fix".
POSITION DISPLAY
- SUMMARY MODE
The position display
in the summary data mode is shown below. The
water
depth shows at the
top
of the screen. Immediately below this is
your present position in both latitude/longitude and time differences
(TO's). The TD's shown are the ones used by the Z-9500 to calculate
the
latitude/longitude.
The message box at the bottom of the screen shows pertinent mes-
sages
when necessary. For example, the cross track error message
appears :"STEER >" when
you move to the left of course.
PRESENT POSITION
N 32° 0002'
W 800 00.12'
V
Z
:
: 45359.73
60866.14
MESSAGE BOX
l']tal:l 5'JFT
68 71
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