122
Reference section 7 — Echo sounding
Echo sounding alarms
Northstar 972
To set the markers:
1. Press
Set upper
2. Press the cursor pad up or down to set the
depth, or use the keypad to manually enter
the desired depth (press
ENTER
when done).
3. Press
Set lower
and
set the depth of the
lower marker in the same way.
Now you must tell the 972 whether you
wish to be notified of fish detected inside
the depth range you’ve set, or outside that
range.
Setting inside or outside fish markers
If you designate the markers as
Inside
markers, the fish alarm sounds when fish
are detected within these markers. If you
set these markers as
Outside
markers, the
fish alarm sounds when fish are detected
outside of these markers.
To set the markers to
Inside
or
Outside
, at
the
fish alarm
window, press
Markers
to
cycle between the two settings.
Turning the fish alarm on and off
To turn the alarm on or off, at the
fish alarm
window, press
Alarms
. Generally, you’ll
want to turn the alarm on
after
you finish
making all the other settings.
Setting the bottom alarm
When the bottom alarm is set, an alarm
sounds if the echo sounder detects that the
bottom is shallower than the limit you’ve
set. A red marker indicates the limit.
When a shallow bottom is detected, the
alert tone sounds and the flashing alarm
icon
BOTTOM
is displayed. This message
clears automatically after 20 seconds, and
the alarm is reset.
To access the bottom alarm:
1. At the
Echo Sounder
screen, press
More
.
2. Press
Alarms
.
3. Press
Bottom alarm.
Now you can set the depth at which you
want to be notified about a shallow
bottom.
Setting the bottom level
To set the bottom level, at the
bottom alarm
window, press the cursor pad up or down
to set the depth, or use the keypad to
manually enter the desired depth (press
ENTER
when done).
NOTE:
The sounder’s depth indicator reflects the depth
below your vessel’s
transducer
, not below the
keel
.
Ask your installer for the exact distance between
your transducer and your keel. This value must
then always be manually added to the sounder’s
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Страница 1: ...Northstar 972 Quickstart Guide and Reference Manual Revision B ...
Страница 12: ...8 Getting Started Purchasing charts Northstar 972 ...
Страница 19: ...15 Displaying the chart screen Quickstart Guide Revision B Chart screen ...
Страница 30: ...26 SAVE and Man Overboard MOB Northstar 972 ...
Страница 44: ...40 Reference section 1 Using the Chart Screen Using the distance and bearing calculator Northstar 972 ...
Страница 54: ...50 Reference section 3 Position coordinates Using Phantom Loran Northstar 972 ...
Страница 88: ...84 Reference section 5 Creating waypoints and routes Transferring waypoints to and from a PC Northstar 972 ...
Страница 90: ...86 Reference section 6 Radar Transferring waypoints to and from a PC Northstar 972 ...
Страница 106: ...102 Reference section 7 Echo sounding MARPA targets Northstar 972 ...
Страница 130: ...126 Reference section 7 Echo sounding Troubleshooting the echo sounder Northstar 972 ...
Страница 131: ...127 Reference Manual Revision B Reference section 8 Video Video sources 128 Displaying video 128 ...
Страница 134: ...130 Reference section 8 Video Displaying video Northstar 972 ...
Страница 135: ...131 Reference Manual Revision B Reference section 9 Alarms and TideTrack Alarms 132 TideTrack 137 ...
Страница 145: ...141 Reference Manual Revision B Reference section 10 Networking General information 142 Restrictions 142 ...
Страница 148: ...144 Reference section 10 Networking Restrictions Northstar 972 ...
Страница 158: ...154 Reference section 11 Setup Changing the time zone Northstar 972 ...
Страница 164: ...160 Reference section 11 Appendix A Datum list Changing the time zone Northstar 972 ...
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