Train Direction; Selecting Tilt Angle; Selecting Picture Advance Speed - Furuno CH-250 Operator's Manual

4.4

Train Direction

The sounding beam may be directed toward fore, aft, port or starboard. Operate the [TRAIN]
control to select sounding beam direction. Each setting on the control is an increment of 6 . The
train indicator at the top of the screen shows training direction: 0 , fore direction; 90 , starboard
direction; 180 , aft direction, and 270 , port direction.
0˚ (360˚) 6˚ 12˚
Train 0˚
4.5

Selecting Tilt Angle

The transducer can pointed directly toward the bottom or forward of the ship. Operate the [TILT]
control to select an appropriate tilt angle. The available tilt angle is 0 (horizontal direction) to
90 (vertical) in increments of 1
of "T".

4.6 Selecting Picture Advance Speed

The picture advance speed determines how quickly the vertical scan lines run across the screen,
from right to left. When selecting a picture speed, keep in mind that a fast advance speed will
expand a fish school horizontally on the screen and a slow one will contract it.
1. Press the [FAST SCAN] key. The following dialog box appears. Do the next step within four
seconds otherwise the dialog box will be erased.
ADVANCE
1/8 1/4
2. Press or ([FAST SCAN] key may also be used) to select a speed. The fractions in
dialog box correspond to the number of scan lines produced per transmission. For example,
"2/1" means two scan lines are produced per transmission.
3. Press the [MENU] key to close the dialog box. Note that the dialog box is automatically
closed if there is no control operation for about four seconds.
4-4
18˚ 354˚
Train 90˚
Figure 4-4 Train indicator and display
.
Selected tilt angle appears at the top of the display to the right
1/2 1/1 2/1
Train 180˚ Train 270˚