Humminbird 300 SERIES 365I - Manual (Page 62)

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Self Test displays results from the internal
diagnostic self test, including unit serial
number, Printed Circuit Board (PCB) serial
number, software revision, total hours of
operation, and the input voltage.
Accessory Test lists the accessories
connected to the system.
NOTE: The speed accessory will be detected only
if the paddlewheel has moved since your
Fishfinder was powered up.
Accessory Test
Self Test Screen
Start-Up Options Menu