Furuno FR-7041R-MARK-2 Operator's Manual page 20

Presentation mode,
representative display
North
marker
North
marker
Description
Course-up Mode (CUP TM)
Heading
An azimuth stabilized display in which a line connect-
marker
ing 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 top of screen while the
heading line moves in accordance with ship's yawing
and course changes. This mode is useful to avoid
smearing of picture during course change.
True Motion Mode (NUP TM)
Heading
marker
Own ship and other moving objects move in accord-
ance with their true courses and speeds. In ground
stablized TM, all fixed targets, such as landmasses,
appear as stationary echoes. In the sea stablized TM
without set and drift input, the landmass can move on
the screen.
When own ship reaches a point corresponding to
75% of the radius of the display, the own ship is
automatically reset to a point of 50% radius opposite
to the extension of the heading line passing through
the display center. Resetting can be made at any
moment before the ship reaches the limit by pressing
the [SHIFT] key. Automatic resetting is preceded by a
beep sound.
If the heading sensor fails, the presentation mode is
changed to the head-up mode and the north marker
disappears. The HDG readout at the top of the
screen shows xxx.x. Restore the heading signal, and
then press the [MODE] key to display the heading.
Figure 1-9b Presentation modes
1. OPERATION
1-11