Furuno FAR-2807 Operator's Manual page 43

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. Note that true motion is not available on
the 72 nm (non-IMO type only) or 96 nm range scale. If COG and SOG (both
over the ground) are not available on TM mode, enter the set (tide direction) and
drift (tide speed) manually referring to the Tide Table.
When own ship reaches a point corresponding to 50% of the radius of the
display, own ship position is automatically reset to a point of 75% radius opposite
to the extension of the heading line passing through the display center. You may
also reset the own ship symbol manually by pressing the [CU/TM RESET] key,
or left-clicking the CU/TM RESET box at the bottom right corner of the display.
If the heading sensor fails, the mode is changed to the head-up and the north
marker disappears. The HDG readout shows ***.*° and the message "GYRO"
appears in yellow-orange at the lower-right corner of the screen.
Note: A part of the bearing scale is drawn differently depending on antenna
reference position.
ANT: Bearing scale interval is different when display is offcentered.
CCRP: A part of the bearing scale is not displayed if the conning position is not
within the radar display area.
Automatic resetting of own ship mark in true motion mode
Heading
line
(a) True motion
is selected
North Marker
North
marker
(b) Own ship has reached a
point 50% of display radius
Heading Line
True motion mode
1. RADAR OPERATION
(c) Own ship is automatically
reset to 75% of radius
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