Humminbird LCR 4000 Operation Manual page 16

USING THE LCR 4000
THEORY OF OPERATION
The LCR 4000 is designed to operate with a standard 16 transducer included with the
unit. Other transducers, such as 32 , cannot be used. In order for your LCR to operate
well at high speeds, you must have a properly mounted transducer. Please read the
transducer mounting procedure carefully.