Furuno MODEL CSH-73 manual Tracking target lock mark, Target lock and tilt angle

4.Select Tracking Method, and then press the [MENU] key.

5.Select method desired.

6.Press the [END] key several times to close the menu.

Tracking target lock mark

1.Operate the trackball to place the trackball mark on the fish school you want to track.

2.Press the [TARGET LOCK] key to light the lamp above it.

The target lock mark ( ) appears on the fish school and tracking begins.

Tilt angle is automatically changed to keep the target lock mark location within the sonar beam.

3. To stop tracking, press the [TARGET LOCK] key again.

Note 1: If the target goes out of the picture or the tilt angle is greater than 60 degrees the lamp above the [TARGET LOCK] key flashes to call your attention.

Note 2: Target lock position and data are calculated according to tilt angle.

Note 3: The bearing mark moves to the target lock mark loca- tion when target lock becomes active. Bearing to the target lock mark is shown.

Note 4: Target lock is temporarily disabled when the distance to the tracked fish school is less then 40 m. It is resumed once the distance becomes more than 40 m.

Note 5: The target lock works up to a tilt angle of 60 degrees. In the drawing below, the tilt angle is fixed at 60 degrees between B and C. During this period, however, calculation is continu- ously being performed. When own ship comes to point C, target lock is resumed.

Depth

ABCD

60° 60°

Figure 7-4 Target lock and tilt angle

7-4