Furuno FR-8111 - Manual (Page 21)

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1.4 Presentation Mode
This radar has the following presentation modes:
Relative Motion (RM)
Head-up: Unstabilized
Course-up: Compass-stabilized relative to
ship’s intended course
North-up: Compass-stabilized with
reference to north
True Motion (TM)
North-up: Ground or sea stabilized with
compass and speed inputs
Selecting presentation mode
Each time the MODE key is pressed, the presen-
tation mode and mode indication at the upper-
left corner of the screen change cyclically.
Loss of gyro signal
When the gyro signal is lost, the presentation
mode automatically becomes Head-up and
the HDG readout at the screen top shows
xxx.x. The x's do not disappear even when the
gyro signal is restored, to warn the operator
that the readout may be unreliable.
Match the gyro readout with the gyrocompass
reading. Press the MODE key.
H
E
A
D
U
P
Presentation mode,
representative display Description
A display withouth azimuth stabilization in which the
line connecting the center with the top of the display
indicates own ship's heading.
The target pips are painted at their measured distances
and in their directions relative to own ship's heading.
The short dashed line on the bearing scale is the north
mark and it indicates compass north.
Failure of the gyro will remove the north marker and
the HDG indication shows "xxx.x".
000 010
020
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C
O
U
R
S
E
U
P
An azimuth stabilized display in which a line con-
necting the center with the top of the display indicates
own ship's intended course (namely, own ship's
previous heading just before this mode has been
selected).
Target pips are painted at their measured distances
and in their directions relative to the intended course
which is maintained at the 0-degree position while the
heading marker moves in accordance with the ship's
yawing and course changes. This mode is useful to
avoid smearing of picture during course changes. After
a course change, press the SHIFT ZOOM key to reset
the picture orientation if you wish to continue using
the Course-up mode.
If the gyrocompass fails, the presentation mode changes
to the Head-up mode and the north marker disappears.
Also, the HDG readout at the screen top shows xxx.x.
000 010
020
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