Furuno FR-2105-B - Manual (Page 29)

-1. 12-
Presentation mode,
representative display
Description
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Heading Line
North
Heading
Marker
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 bearing maintained up of the screen.
The heading line changes its direction according to the
ship’s heading.
If the gyrocompass fails, the presentation mode changes
to head-up and the north marker disappears. Also, the
HDG readout shows asterisks (***.*) And the message
GYRO appears in red at the lower-right corner of the
screen.
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Heading Line
North
Heading
Marker
True motion mode
Own ship and other moving objects move in accordance
with their true courses and speed. In ground stabilized
TM, all fixed targets, such as landmasses, appear as
stationary echoes. In the sea stabilized TM without set
and drift inputs, the landmass can move on the screen.
When own ship reaches a point corresponding to 75% of
the radius of the display, it is automatically reset to a point
of 75% 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]. Automatic resetting is
preceded by a beep sound.
If the compass fails, the mode is changed to the head-up
and the north marker disappears. The HDG readout
shows asterisks (***.*) and the message GYRO appears
in red at the lower-right corner of the screen.
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Target trail
(a) True motion Is selected (b) Own ship has reached a
point 75% of display radius (c) own ship is automatically
reset to 75% of radius