Furuno 1954C-BB manual

Furuno 1954C-BB
9.6 · 1
PDF manual
 · 223 pages
English
manualFuruno 1954C-BB
4. VIDEO SOUNDER OPERATION
4-21

4.15.3 Fish school echoes

Fish school echoes will generally be plotted between the zero line and the bottom. Usually
the fish school/fish echo is weaker than the bottom echo because its reflection property is
much smaller compared to the bottom. The size of the fish school can be ascertained from
the density of the display.
Size of
fish school
Small
school
Large
school
Fish school echoes

4.15.4 Surface noise/Aeration

When the waters are rough or the boat passes over a wake, surface noise may appear near
the zero line. As surface turbulence is acoustically equivalent to running into a brick wall,
the bottom echo will be displayed intermittently. Similar noise sometimes appears when a
water temperature difference (thermocline) exists. Different species of fish tend to prefer
different temperature zones, so the thermocline may be useful to help identify target fish.
200 kHz tends to show shallow thermoclines better than 50 kHz.
In rough waters the display is occasionally interrupted due to below-the-ship air bubbles
obstructing the sound path. This also occurs when the boat makes a quick turn or reverses
movement. Lowering the picture advance speed may reduce the interruption. However,
reconsideration of the transducer installation may be necessary if the interruption occurs
frequently.
Surface noise
Caused by aerated
water
Thermocline
Surface noise/aeration

Manual

View the manual for the Furuno 1954C-BB here, for free. This manual comes under the category marine radars and has been rated by 1 people with an average of a 9.6. This manual is available in the following languages: English. Do you have a question about the Furuno 1954C-BB or do you need help? Ask your question here

Index

Need help?

Do you have a question about the Furuno and is the answer not in the manual?

  • Receive updates on solutions
  • Get answers to your question

Question and answer

Number of questions: 0

Furuno 1954C-BB specifications

Below you will find the product specifications and the manual specifications of the Furuno 1954C-BB.

General
BrandFuruno
Model1954C-BB
Productmarine radar
LanguageEnglish
FiletypeUser manual (PDF)

Frequently Asked Questions

Can't find the answer to your question in the manual? You may find the answer to your question in the FAQs about the Furuno 1954C-BB below.

Is the manual of the Furuno 1954C-BB available in English?

Yes, the manual of the Furuno 1954C-BB is available in English .

Is your question not listed? Ask your question here

No results