Furuno CH-37 Operator's Manual page 58

3-14
[2] PURSE SEINER
Usage
Tracking fish
Observation of fish movement/bottom shape
Confirmation of net forming
1 Approach the fish school while observing their distribution on
the sonar mode.
2 While approaching, face the sounding beam toward the fish
schools and confirm their distribution. The display shown
below is off-centered* to obtain a wider view of the starboard
side.
3 Shoot the net, and then observe the location of the fish and
the status of the net.
Figure 3-17 Vertical fan mode usage on purse seiner
Fish
school
*Automatically shifted.
Fish
school
Net