Lowrance electronic X-70A 3D manual

The depth alarms sound a tone when the bottom signal goes shallower than the shal- low alarm’s setting or deeper than the deep alarm’s setting. For example, if you set the shallow alarm to ten feet, the alarm will sound a tone if the bottom signal is less than ten feet. It will continue to sound until you mute it or the bottom goes deeper than 10 feet.The deep alarm works just oppo- site. It sounds a warning tone if the bottom depth goes deeper than the alarm’s set- ting. Both depth alarms work only off the digital bottom depth signals. No other tar- gets will trip these alarms. Both can be used at the same time.

To set the depth alarms, press the key adjacent to the alarm you wish to set. In this example, we will set and turn on the shallow alarm. When the X-70A 3D is turned on, the shallow alarm is set to zero. Pressing the key next to the “Shal Alarm” menu moves the check mark to the "SET" box. This brings up the adjustment menu, as shown above. Using the numbered keys, enter the depth for the shallow alarm. In this example, we used 10 feet. Press the key next to the “Ac-

cept” label. The screen returns to the alarm menu. The number you en- tered shows on the shallow alarm’s menu.You’ll also notice that the check mark in the shallow alarm’s menu has moved to the “ON” box. Setting an alarm also turns it on. Press the CLR key to return to the sonar display. Using our example, if the bottom signal goes lower than 10 feet, the shal-

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