How do I set up the deep water alarm?
Press the ON/OFF MODE keypad until 'DP' appears on the display, which is the deep depth alarm setting. Press and hold the up or down arrow keypads to adjust to the desired depth. When that depth is reached, 'DP' will flash on the LCD and the audible alarm will sound at 2 beeps per second. (Page 3)
From the official Faria Beede Is0091 manual, page 3
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