How To Interpret, Set The History Display; Interpreting The History Display; Setting The History Marker - Furuno FSV-30 Operator's Manual

5.3

How to Interpret, Set the History Display

5.3.1

Interpreting the history display

Horizontal range
Depth
Color bar
Own ship mark
Trackball mark
Distance from
own ship position
to bow (or stern)
5.3.2

Setting the history marker

Use the trackball to locate the trackball marker on the horizontal display and
then press the [R/B AUDIO] key. The history marker moves to the trackball
marker and is centered on the ship's bow, extending 60 in both port and
starboard directions. Own ship mark is fixed at own ship position. The slant
range is automatically changed whenever the tilt angle is changed, to keep the
history marker at a constant depth. When the tilt angle is shallow and the slant
range to the history marker is greater than the range set with the RANGE control,
the sampling point becomes the range in use.
(3)
(2)
R: Range (Range set by RANGE control)
r: Slant range to history marker, set with trackball. Automatically changes with tilt angle.
d: Depth (constant) to history marker
185m
156m
180
35P
Distance from own ship position to port (or starboard)
P: Port
S: Starboard
How to interpret the history display
d
d
(1)
R
History marker
Slant range and tilt angle
Echo data inside
history marker
HISTORY MARKER
* Set on H-SLICE WIDTH
in DISPLAY SETTING
menu. See next page.
Scroll direction
Sync with ship speed
or KP transmission
† Automatically
changes with
tilt angle.
The slant range is automatically changed whenever
r the tilt angle is changed, to keep the history marker
at a constant depth. When a shallow tilt angle is used,
the picture inside the history marker is
® ®
from (1) (2)
5. HISTORY MODE
History marker
width*
History
marker
Own ship
mark
120
Slant
range†
(3), according to tilt angle.
5-3