Humminbird PIRANHAMAX 190CPT - Manual (Page 26)

Single Beam Sonar
The PiranhaMAX™150 and PiranhaMAX™190c use a 200 kHz single beam
sonar system with a 20° area of coverage. Boat speed, wave action, bottom
hardness, water conditions and transducer installation can all affect depth
capability.
Dual Beam Sonar
The PiranhaMAX™160 uses a 200/83 kHz dual beam sonar system with a
wide (60°) area of coverage. Dual Beam sonar is optimized to show the greatest
bottom definition using a narrow (20°) beam yet can still indicate fish found
in the wide (60°) beam when the Fish ID+
TM feature is turned on. Dual Beam
is ideal for a wide range of conditions - from shallow to very deep water in
both fresh and salt water. Boat speed, wave action, bottom hardness, water
conditions and transducer installation can all affect depth capability.
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