Furuno FR-1710 - Manual (Page 22)

1-8
Description
True Motion Mode
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North
marker
Presentation mode,
representative display
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 75% 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 compass 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
°
.
Heading
line
Heading
marker
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marker
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(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
Automatic resetting of own ship position in true motion mode
1.11 Selecting the Range Scale
The range selected automatically determines
the range ring interval, the number of
range rings and pulse repetition rate, for
optimal detection capability in short to long
ranges. You can select pulselength with
the ECHO control. For details, see para-
graph 1.13.
Press the [RANGE] key to select a range
scale. The range, range ring interval and
pulselength appear at the top left corner of
the display.