1. OPERATIONAL OVERVIEW
1-9
Course-up mode
The course-up mode is an azimuth stabilized dis-
play 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 dis-
tances and in their directions relative to the
intended course, which is maintained at the 0-
degree position. The heading line moves in accor-
dance with ship's yawing and course change. This
mode is useful to avoid smearing of picture during
course change.
North-up mode
The north-up mode paints target pips at their measured dis-
tances and in their true (heading sensor) directions from own
ship, north bearing maintained at the top of the screen. The
heading line changes its direction according to the ship's
heading.
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.
When own ship reaches a point corresponding to 75% 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 OFF
CENTER key. The method of resetting is the same as men-
tioned above.
Heading Line
North Marker
Heading Line
North Marker
Heading Line
North Marker
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