470005
15
Zoom out
Zoom in
Previous page
1/36
Next page
4-1 Interpreting the display
The sonar displays do not show a fixed distance
travelled by the boat; rather, they display a his-
tory, showing what has passed below the boat
during a certain period of time.
The history of the sonar signal displayed de-
pends on the depth of the water and the scroll
speed setting.
In shallow water, the echoes have a short
distance to travel between the bottom and the
boat. In deep water, the history moves across
the display more slowly because the echoes
take longer to travel between the bottom and the
boat. For example, when the scroll speed is set
to Fast, at depths over 1000 ft. (300 m) it takes
about 4 minutes for each vertical line of pixels
to move across the display, whereas at 20 ft. (6
m) it takes only about 15 seconds.
The scroll speed can be set by the user to display
either a longer history with less fish information
or a shorter history with more fish details. See
section 3-2 Setup > Sonar.
If the boat is anchored, the echoes all come from
the same area of bottom. This produces a flat
bottom trace on the display.
The screen shot shows a typical sonar display
with the Fish symbols turned Off.
Large
school of
fish
Strength of echoes
The colors indicate differences in the strength of
the echo. The strength varies with several factors,
such as the:
Size of the fish, school of fish or other object.
Depth of the fish or object.
Location of the fish or object. (The area cov-
ered by the ultrasonic pulse is a rough cone
shape and the echoes are strongest in the
middle.)
Clarity of water. Particles or air in the water
reduce the strength of the echo.
Composition or density of the object or bot-
tom.
Note: Planing hulls at speed produce air bubbles
and turbulent water that bombard the transducer.
The resulting ultrasonic noise may be picked up
by the transducer and obscure the real echoes.
4 Using the FISH 4500/4600
This section explains how to interpret the
sonar displays, when and why to use the dif-
ferent frequencies and how fish are detected
and displayed.
Single fish
Kelp / Weed
Hard bottoms
such as
rock or coral
show as wide
bands
Soft bottoms
such as mud,
weed and
sand show
as narrow
bands
Bottom types
Mud, weed and sandy bottoms tend to weaken
and scatter the sonar pulse, resulting in a weak
echo. Hard, rocky or coral bottoms reflect the
pulse, resulting in a strong echo. See section
5-3 Sonar Bottom display.
Small school
of fish
Bottom
It also describes Gain and Range and shows
examples of some of the different sonar displays.
Also see section 1-2 How the FISH 4500/4600
works.
FISH 4500/4600 Installation and Operation Manual 15
NAVMAN
15


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Navman FISH 4600 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Navman FISH 4600 in the language / languages: English as an attachment in your email.

The manual is 1,43 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

Others manual(s) of Navman FISH 4600

Navman FISH 4600 User Manual - German - 39 pages

Navman FISH 4600 User Manual - Dutch - 40 pages

Navman FISH 4600 User Manual - French - 38 pages

Navman FISH 4600 User Manual - Italian - 38 pages

Navman FISH 4600 User Manual - Portuguese - 38 pages

Navman FISH 4600 User Manual - Swedish - 37 pages

Navman FISH 4600 User Manual - Spanish - 39 pages


The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info