Samyung NAVIS800FS Instruction Manual page 65

2.2.5 Water Depth Alarm
This function is to provide an alarming for the operators when it senses any specific water depth within the
preset alarming range through the transducers. It is available to input 1m ~ 999m.
 Press
(
 Use
(
buttons.
) button and move [2.SET]  [2.ALARM SET]  [5.DEPTH ALARM].
) button to select [ON] / [OFF] and input the water depth alarming with the number
65