How To Use The Vertical Fan Mode - Furuno CH-37 Operator's Manual

Furuno color sector scanning sonar operator's manual model ch-37

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3.12 How to Use the Vertical Fan Mode

Auto train

[1] TRAWLER (Surface/Mid-water/Bottom)

Usage

Fish school detection

Bottom shape discrimination

Relation between fish school and fishing gear

1 Turn on the AUTO TRAIN key on the sub panel 2 and set the

direction of the train center to the fore-aft direction. Observe

the fish school near the bow of the ship, or inspect the bot-

tom contour.

2 After detecting a fish school, steer the boat toward that

direction, turning off the "AUTO TRAIN" to observe that

direction.

3 When approaching the fish school, change the beam direc-

tion to port-starboard by the TRAIN control and maneuver

the boat so that the fish are led into the trawl net.

4 To observe the hauling of the net, turn the sounding beam to

the fore-aft direction.

Figure 3-16 Vertical fan mode usage in trawling

Fish

schools

Shoal

Net

Bow

Steered

angle

3-13

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