Garmin echomap chirp 40 series Owner's Manual - Sonar
Steering Patterns
WARNING
You are responsible for the safe operation of your boat. Do not
begin a pattern until you are certain that the water is clear of
obstacles.
The autopilot can steer the boat in preset patterns for fishing,
and it can also perform other specialty maneuvers such as U-
turns and Williamson turns.
Following the U-Turn Pattern
You can use the u-turn pattern to turn the boat around 180
degrees and maintain the new heading.
1
From the autopilot screen, select
MENU
>
Pattern Steering
>
U-Turn
.
2
Select
Engage Port
or
Engage Starboard
.
Setting Up and Following the Circles Pattern
You can use the circles pattern to steer the boat in a continuous
circle, in a specified direction, and at a specified time interval.
1
From the autopilot screen, select
MENU
>
Pattern Steering
>
Circles
.
2
If necessary, select
Time
, and select a time for the autopilot
to steer one complete circle.
3
Select
Engage Port
or
Engage Starboard
.
Setting Up and Following the Zigzag Pattern
You can use the zigzag pattern to steer the boat from port to
starboard and back, over a specified time and angle, across
your present heading.
1
From the autopilot screen, select
MENU
>
Pattern Steering
>
Zigzag
.
2
If necessary, select
Amplitude
, and select a degree.
3
If necessary, select
Period
, and select a length of time.
4
Select
Engage Zigzag
.
Following the Williamson Turn Pattern
You can use the Williamson turn pattern to steer the boat
around with the intent of running alongside the location where
the Williamson turn pattern was initiated. The Williamson turn
pattern can be used in man overboard situations.
1
From the autopilot screen, select
MENU
>
Pattern Steering
>
Williamson Turn
.
2
Select
Engage Port
or
Engage Starboard
.
Sonar
When properly connected to a compatible transducer, your
chartplotter can be used as a fishfinder. Different sonar views
can help you view the fish in the area.
The adjustments you can make to each sonar view vary
depending on the view you are in and the chartplotter model and
transducer you have connected.
Sonar Views
The sonar views available vary depending on the type of
transducer and optional sounder module connected to the
chartplotter. For example, you can view the Split Frequency
view only if you have a dual-frequency transducer connected.
There are four basic styles of sonar views available: a full-
screen view, a split-screen view that combines two or more
views, a split-zoom view, and a split-frequency view that
displays two different frequencies. You can customize the
settings for each view in the screen. For example, if you are
viewing the split-frequency view, you can separately adjust the
gain for each frequency.
Traditional Sonar View
There are several full-screen views available, depending on the
equipment connected.
The full-screen Traditional sonar view show a large image of the
sonar readings from a transducer. The range scale along the
right side of the screen shows the depth of detected objects as
the screen scrolls from the right to the left.
À
Depth information
Á
Suspended targets or fish
Bottom of the body of water
Garmin ClearVü Sonar View
NOTE:
To receive Garmin ClearVü scanning sonar, you need a
compatible chartplotter or fishfinder and a compatible
transducer.
Garmin ClearVü high-frequency sonar provides a detailed
picture of the fishing environment around the boat in a detailed
representation of structures the boat is passing over.
Traditional transducers emit a conical beam. The Garmin
ClearVü scanning sonar technology emits two narrow beams,
similar to the shape of the beam in a copying machine. These
beams provide a clearer, picture-like image of what is beneath
the boat.
SideVü Sonar View
NOTE:
Not all models support SideVü sonar and scanning
transducers.
NOTE:
To receive SideVü scanning sonar, you need a
compatible chartplotter and a compatible transducer.
SideVü scanning sonar technology shows you a picture of what
lies to the sides of the boat. You can use this as a search tool to
find structures and fish.
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Sonar