Hummingbird markets a line of depth sounders for marine use that use sonar to determine the depth of the water beneath the boat's transducer. The transducer is mounted on the boat below the water line. The transmitter in the sonar unit emits a electrical signal that is converted to a sound wave. The sound wave bounces off the bottom and is received by the transducer. The transducer then interprets the reflected signal and sends a readout to the display to indicate the depth of the water. The Hummingbird depth finder features alarms for both shallow and deep water, which can be set by pressing button sequences on the face of the unit.
Items you will need
Boat with a properly installed Hummingbird depth sounder
Basic Operation
Turn on the boat's ignition to start the depth finder.
Observe the depth finder display, where the depth of the water in feet beneath the boat is shown.
Move the boat and continue to observe the display. The display will automatically change as the depth of the water beneath the boat changes.
Setting Shallow Alarm
Press the "Set" button one time. The "Set" button is on the front of the depth finder below the display.
Press the up arrow button to activate the shallow alarm.
Press the up button or the down button to increase or decrease the value until the desired shallow depth setting is displayed.
Wait five seconds after the last button is pressed for the depth finder to return to normal mode.
Setting Deep Alarm
Press the "Set" button until the "Deep" icon starts blinking on the display, then release the "Set" button.
Press the up arrow button to activate the deep alarm.
Press the up button or the down button to increase or decrease the value until the desired deep depth setting is displayed.
Wait five seconds after the last button is pressed for the depth finder to return to normal mode.
Setting Units
Press the "Set" button until the "Units" icon starts blinking on the display, then release the "Set" button.
Press the up button or the down button to scroll through the unit choices. The options are "FT" for feet, "M" for meters and "FA" for fathoms. Release the arrow button when the desired unit is in the display.
Wait five seconds after the last button is released for the depth finder to return to normal mode.