Furuno CH-37 - Manual (Page 11)

1-1
OPERATIONAL OVERVIEW
1.1 Control Description
Main panel
PWR
O TRANSDUCER
FULL
HALF
EVENT
ENTER
1 2 3
CUSTOM MODE
CH-37
R/B
MODE
TRAIN
SECTOR TILT
RANGE
+
0
2
4 6
8
10
GAIN
Switches on and off the entire system.
Selects display mode (from left-hand position):
Normal Sonar Mode or Normal Sonar Mode + E/S Combination*
Expanded Sonar Mode
Vertical Fan Mode or Vertical Fan Mode + E/S Combination*
3D Display* (front perspective view)
3D Display* (slant perspective view) *: Optional supply
Selects the detecting (display) range. Turn clockwise to increase the
detection range. The selected range appears in large characters for a
few seconds and remains at the upper right corner of the screen.
Determines the center bearing of the train sector. The selected bear-
ing appears by a large white mark on the bearing scale. In the
expanded sonar mode, it controls the direction to be off-centered (four
directions). In the vertical fan mode, it determines the bearing of the
vertical fan training.
Adjusts the sensitivity of the receiver. Turning the control clockwise
increases the sensitivity. When changing the range and tilt settings,
readjust the sensitivity. For normal use, set it between 3 and 5.
In the sonar mode, it controls the tilt angle, between +5
°
and -90
°
. The
setting angle is set in 1-degree steps and appears at the upper right
corner of the screen. In the vertical fan mode, it determines the sector
center of vertical scanning.
In the sonar mode, it selects the width of the transducer training sector
among six positions (45
°
, 90
°
, 135
°
, 180
°
, 225
°
, and 360
°
). The direc-
tion of training can be made in both directions except at the 360
°
set-
ting. In the vertical fan mode, the sector widths are 36
°
, 60
°
, 96
°
, 120
°
,
156
°,
and 180
°
. FULL/HALF key switches the training sector or sector
width between full circle and half circle by single key stroke.
The trackball moves the trackball marker (+). The trackball mark data,
that is, slant range, horizontal range, depth and bearing to the track-
ball marker, are always indicated on the screen. Additionally, this con-
trol positions the R/B (Range/Bearing) marker and sets the event
marker, with the R/B and the EVENT keys. The EVENT key displays
the event marker.
Controls the transducer. Each switch functions as follows:
: Raises the transducer.
: Lowers the transducer.
Provides user-defined sonar settings with a single key. The ENTER
key opens the custom mode key setting menu.
-
Figure 1-1 Main panel