4-2
hsb
2
Plus Series Fishfinders
Fish In
dic
ati
ons
The Fishfinder provides a White Line feature which helps to distinguish
between the bottom and fish (or other items such as weed) that are close to the
bottom.
Fish Indications
When the Fishfinder detects a fish, it displays an arch-shaped mark. In
general, a larger arch indicates a larger fish, though this rule is not always true.
Let’s say that there are two fish of the same size: one is close to the surface, the
other is near the bottom. The fish which is close to the surface has a larger arch
because, being closer, more sound waves get returned to the Fishfinder.
To display the depth of the fish, switch on the
TARGET DEPTH ID
from the
SONAR SET UP
menu, as described in
Section 7.4, Fishfinder Set Up
Parameters
.
The sound waves are actually reflected by the swim bladder near the center of
the fish, not by the body of the fish. The size of this swim bladder is different
for different kinds of fish and this can affect the size of fish arches on the
image. A fish with a large swim bladder produces a large fish arch, while a fish
with a small one produces a small arch. Several arches together show a school
of fish. Figure
Figure 4-1
illustrates some typical fish indications.
Figure 4-1:
Fish Indications
An arch-shaped image indicates a fish.
The same fish appears differently when shown by the
50 kHz or 200 kHz transducer beams.
A shallow arch is generated when the the boat is
moving slowly.
This indicates a group of small fish.
A fish moving under a stopped boat shows as a line.
When the boat is moving very fast, a fish appears as
two parallel lines.
D5017-2
50 kHz
200 kHz
Summary of Contents for hsb2 PLUS
Page 1: ...hsb2 PLUS Series Fishfinders Owner s Handbook Document number 81195_2 Date August 2002...
Page 2: ......
Page 34: ...1 22 hsb2 Plus Series Fishfinders Database Lists...
Page 64: ...2 30 hsb2 Plus Series Fishfinders Transmitted Data...
Page 110: ...4 14 hsb2 Plus Series Fishfinders MOB...
Page 160: ...5 50 hsb2 Plus Series Fishfinders Review Your Passage Plan...
Page 172: ...6 12 hsb2 Plus Series Fishfinders Data Log Mode...
Page 200: ...8 8 hsb2 Plus Series Fishfinders Worldwide Support...
Page 204: ...A 4 hsb2 Plus Series Fishfinders Appendix A Specifications...
Page 216: ...C 6 hsb2 Plus Series Fishfinders Appendix C C MAP Chart Card Features...
Page 228: ...viii hsb2 Plus Series Fishfinders...
