Humminbird HDR 650 - Manual (Page 34)

Operating the HDR 650
Your HDR 650 Digital Depth Sounder sends a sound wave signal and determines
distance by measuring the time between the transmission of the sound wave and
when the sound wave is reflected off of an object. As your HDR 650 transducer
receives sonar signals, it converts them to a digital depth that is shown on the
HDR 650 display. The depth reading is continuously updated as you travel across
the water. The liquid crystal display (LCD) offers sharp viewing, even in bright,
direct sunlight, and is continuously lit for nighttime operation.
NOTE: Actual depth capability depends on such factors as bottom hardness, water
conditions, and transducer installation. Units will typically read to deeper depths in
fresh water than in salt water.
The HDR 650 Control Head
The HDR 650 uses a backlit display, together with a 3-button keypad, to control
all user functions. The illustration below shows an example of the digital display.
HDR 650
Depth
Alarm Icon
(flashes to
indicate
alert) Shallow Alarm
Icon
(indicates
Shallow Alarm
is set)
Units
DOWN arrow key MENU key UP arrow key
30 Operations