Furuno FR-1500 MARK-3 Series Radar Detector User Manual


 
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Presentation mode, representative display
Description
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North marker
Heading Line
Heading Marker
Head-up mode
A display without 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.
A shoreline on the bearing scale is the north marker
indicating compass north. A failure of the compass
input will cause the north marker to disappear and the
readout to show xxx.x° and the message GYRO
SIGNAL MISSING appears in red at the lower-right
corner of the screen.
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North marker
Heading Line
Heading Marker
Course-up mode
An azimuth stabilized display in which a line
connecting 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 line moves in accordance with ship’s yawing
and course change. This mode is useful to avoid
smearing of picture during course change. After a
course change, press the [SHIFT] key to reset the
picture orientation if you wish to continue using the
course-up mode. The heading line gets back to scale
zero.
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North marker
Bearing scale rotates with a compass signal
Heading Marker
Head-up TB (True Bearing) mode
Radar echoes are shown in the same way as in the
head-up mode. The difference from normal head-up
presentation lies in the orientation of the bearing
scale. The bearing scale is compass stabilized. That
is, it rotates in accordance with the compass signal,
enabling you to know own ship’s heading at a glance.
This mode is available only when the radar is
interfaced with a gyrocompass.
If the compass fails, the bearing scale returns to the
state of head-up mode.