Humminbird Piranha 4 User Manual
Thank You
Thank you for purchasing a Piranha fishfinder from
Humminbird, America’s #1 Manufacturer of quality consumer marine electronics
WARNING! This device should not be used as a
navigational aid to prevent collision, grounding, boat
damage, or personal injury. When the boat is moving,
water depth may change too quickly to allow time for you
to react. Always operate the boat at very slow speeds if
you suspect shallow water or submerged objects.
Installation Overview
Use the included installation guide to properly install your new
Piranha. Installation must be done correctly to ensure best performance.
Using the Piranha
The Piranha is the easiest to use fishfinder ever.For most
anglers, all you’ll ever need to do is Power On & Fish! The
Piranha automatically determines depth and makes adjustments
to keep the bottom and fish visible on the display.
The Piranha uses sonar technology to send sound waves from
the transducer into the water. The returned “echoes” are plotted
on the Piranha’s LCD display and create a very accurate picture
of the underwater world with distance to underwater objects
such as the bottom, fish and structure.
Powering ON and OFF
Press and release POWER-MENU to power the Piranha on. Press
and hold POWER-MENU until the unit shuts down to power off.
When Piranha powers on, the Start Up menu temporarily
appears. From this menu, select either Start-Up for on-the-water
use, or Simulator for learning to use
the system with simulated sonar data.
The Start-Up menu disappears after
several seconds and the Piranha
begins operation.
What You See On Screen
The Piranha displays underwater information in an easy-tounderstand format. The top of the display corresponds to the
water surface, and the bottom of the display corresponds to the
Depth Range automatically selected for the current water depth.
The Bottom Contour varies between the two as the depth under
the boat changes. Digital readouts provide precise information
for depth, fish and water temperature (separate purchase may
be required).
PIRANHA 3, 4 & 5 OPERATION GUIDE
Water Temperature Capable
(Optional purchase required)
Fish Icons
Depth Range*
Structure ID™ Bottom Contour
Fish ID Symbol w/ Fish Depth
Water Surface Line
Depth – Measured at the Transducer
Screen
Left Arrow Button
Power/Menu Button
Right Arrow Button
Understanding the On-screen Images
As the boat moves, terrain and bottom composition variations
are displayed on-screen. Fish, bait fish and thermoclines (underwater temperature changes) are displayed when detected.
Underwater conditions vary greatly, so some experience and
interpretation is needed to realize all the benefits of the Piranha
– use the picture below as a guide to the most common conditions and practice using the Piranha over known bottom types.
Accessing Menu Features
A simple menu system accesses Piranha’s adjustable features.
To activate the menu system, press POWER-MENU and a menu
appears. Press POWER-MENU repeatedly to access other
Piranha menus one at a time. When a menu is on the display,
use the right and left arrow keys to adjust the menu. Menus
automatically are removed from the screen after several seconds.
Note: Each time POWER-MENU is pressed, the backlight
momentarily illuminates for easy viewing at night. Adjust
the Light menu setting to keep the light on.
Note: If Simulator Mode is selected from the Startup Menu
and a transducer is plugged in, menu settings are saved in
memory. Menu settings are not saved from Simulator
mode without a transducer connected.
Light
(Setting Not Saved in memory,
Defaults to OFF)
Press POWER-MENU until the LIGHT menu appears. Select either
OFF, LOW or HIGH to activate the backlight at the desired level.
Note: Continuous backlight operation significantly
decreases battery life on Piranha Portables.
Sensitivity
(Setting Saved in Memory, )
Press POWER-MENU until the
SENSITIVITY menu appears. Select a higher number to show
smaller sonar returns on-screen, or a lower number to remove
clutter from the screen. Adjusting Sensitivity also affects how
sonar returns are identified as
Fish ID Symbols - more fish will
be detected at a higher setting,
fewer at a lower setting. 5 is the
Factory Setting.
Depth Range Menu
(Setting Not Saved in Memory,
Defaults to Auto)
Press POWER-MENU until the Depth Range menu appears.
Select AUTO to have the Piranha automatically select the Depth
Range or manually select 15, 30, 60, 120, 180, 240, 360, 480
and 600 ft. This locks the depth range to a specific setting.
Note: In manual operation, if the depth is greater than the
depth range setting, the bottom will not be visible onscreen. Select AUTO to return to automatic operation.
Zoom
(Setting Not Saved in Memory,
Defaults to OFF)
Press POWER-MENU until the Zoom menu appears. Select AUTO
to magnify the area around the bottom thus revealing fish and
structure close to the bottom that may not be visible in typical
operation. In AUTO, the Piranha continually changes the upper
and lower Depth Range to keep area just above and below the
bottom on the display. Select OFF to return to normal operation.
(illustration top of page O-13)
O-12
Menu Title
Setting
Button Changes
A button has no function when
the menu arrow is not displayed.
Low Sensitivity
Normal Sensitivity
High Sensitivity
Water Surface Line
Depth – Measured at the Transducer
Thermocline
Bait fish
Fish ID+
Structure
Rocky Bottom Depth Contour Soft Bottom Hard Bottom
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