3.2Detecting Fish Schools Aurally

Sometimes you may be preoccupied with other tasks and unable to concentrate on watching the sonar picture. In such cases it would be a good choice to use the audio function. This function enables you to monitor echoes from fish schools and bottom through the built-in speaker.

After you’ve become accustomed to monitoring fish aurally, you should be able to detect a fish school from a range longer than you can detect it on the screen. In addition you may judge whether the fish school is approaching or going away; the tone becomes higher when the school is approaching and lower when the school is going away.

1.Operate the trackball to place the trackball mark on the direction you want to monitor through the speaker. (If the trackball mark is placed on the own ship mark when the [R/B] key is pressed, the range and bearing marks and range and bearing marks data are erased.)

2.Press the [R/B] key. The bearing mark appears on the bearing selected with the trackball mark. Listen to echoes through the loudspeaker. You may adjust the volume of the loudspeaker with AUDIO VOLUME on the SONAR menu.

3.To change aural coverage area, do the following:

a)Press the [MENU] key to open the menu.

b)Use the [RANGE] control to choose [MENU MODE] at the top of the screen.

c)Use the [GAIN] control to choose SONAR.

d)Use the [RANGE] control to choose AUTO TRAIN.

e)Use the [GAIN] control to choose ON.

f)Use the [RANGE] control to choose TRAIN SECTOR.

g)Use the [GAIN] control to choose train sector among ±10°, ±20°, ±40° and ±60°.

Train Sector

Bearing Mark

Range Mark

R 400 B 45S*

Range and bearing marks data

*= Relative bearing format may be chosen with OTHER MARKS in the MARKS menu.

h)Press the [MENU] key to close the menu. Then, automatic training starts, centered on the bearing mark.

To turn off automatic training, choose OFF at step e).

3-3

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Furuno CSH-5L/CSH-8L manual Detecting Fish Schools Aurally
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CSH-5L/CSH-8L specifications

Furuno CSH-5L and CSH-8L are advanced marine radar systems known for their cutting-edge technology and user-friendly interfaces. Designed primarily for maritime applications, these radar units cater to a wide range of vessels, from commercial ships to fishing boats. The primary distinguishing feature of the CSH-5L and CSH-8L radar systems lies in their ability to provide high-resolution images and precise detection of targets, ensuring navigational safety and operational efficiency on the water.

One of the standout technologies incorporated into both models is the pulse compression technique. This feature significantly enhances target resolution and minimizes blind spots, allowing the radar to detect smaller objects at greater distances. With the CSH-5L and CSH-8L's powerful signal processing capabilities, users can expect exceptional performance even in challenging weather conditions, ensuring reliable operation during storms or fog.

The CSH-5L model operates at a frequency range of 5 GHz, while the CSH-8L uses an 8 GHz frequency. Both radars are equipped with a rotating antenna that provides a wide coverage range, allowing for efficient monitoring of the surrounding marine environment. Their high sensitivity and low noise levels enhance target detection, making them particularly useful for locating small fishing vessels or buoys.

Another important characteristic of the Furuno CSH-5L and CSH-8L is their user-friendly interfaces. Both models feature intuitive controls, allowing operators to adjust settings easily and access critical information quickly. The displays are designed for clarity, enabling users to distinguish between targets and navigate effectively.

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In summary, the Furuno CSH-5L and CSH-8L radar systems represent the forefront of marine radar technology, offering exceptional detection capabilities, user-friendly controls, and robust integration options. Their advanced features ensure that mariners can navigate confidently, making them a vital asset for anyone operating in the marine environment.
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