Furuno FR-2805 Series - Manual (Page 26)

1-11
Presentation mode,
representative display Description
North-up Mode
In the north-up mode, target pips are painted at their
measured distances and in their true (compass)
directions from own ship, north being maintained
UP of the screen. The heading marker changes its
direction according to the ship's heading.
If the gyrocompass fails, the presentation mode
changes to head-up and the north maker disappears.
Also, the GYRO readout shows asterisks (***.*)
and the messageSET HEADING appears at the
lower-left corner of the screen.
000 010
020
030
040
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Heading
line
North
marker
True Motion Mode
Own ship and other moving objects move in accord-
ance with their true courses and speeds. All fixed
targets, such as landmasses, appear as stationary
echoes.
When own ship reaches a point corresponding to 75%
of the radius of the display, the own ship is auto-
matically reset to a point of 50% radius opposite to
the extension of the heading marker passing through
the display center. Resetting can be made at any
moment before the ship reaches the limit by pressing
the [CU, TM RESET] key. Automatic resetting is
preceded by a beep sound.
If the gyrocompass fails, the presentation mode is
changed to the head-up mode and the north marker
disappears. The GYRO readout at the top of the
screen shows asterisks (***.*) and the message SET
HEADING appears at the lower-left corner of the
screen.
000 010
020
030
040
050
060
070
080
090
100
110
120
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150
160
170 180 190
200
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000 010 020
030
040
050
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160 170 180 190 200
210
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290
300
310
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340 350 000 010 020
030
040
050
060
070
080
090
100
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120
130
140
150
160 170 180 190 200
210
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270
280
290
300
310
320
330
340 350 Heading
line
North
maker
000 010 020
030
040
050
060
070
080
090
100
110
120
130
140
150
160 170 180 190 200
210
220
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340 350
(a) True motion
is selected (b) Own ship has reached a
point 75% of display radius (c) Own ship is automatically
reset to 50% of radius
Automatic resetting of sweep center in true motion mode