Suunto D4 manual Alarm type

Table 5.1. Audible and visual alarm types

Alarm type	Alarm reason
Short single beep	Dive computer is activated.

Dive computer automatically returns to the TIME mode.

Three beeps with a three second interval and activated backlight

Continuous beeps and activ- ated backlight

No-decompression dive turns into a Decompression Stop dive. An arrow pointing upwards and the blinking ascent warning ASC TIME will appear.

Maximum allowed ascent rate, 10 m per min/33 ft per min, is exceeded. Ascent rate bar graph blinks and STOP warning appears.

Decompression ceiling depth is exceeded. An Error warning (Er) and a downward pointing arrow appear. You should immediately descend to, or below, the ceiling. The instrument will otherwise enter a perman- ent Error mode within three minutes, indicated by a permanent Er symbol.

You are able to preset alarms before the dive for maximum depth, dive time and time. See also Section 5.8. DIVE mode settings and Section 4.1. TIME mode settings.

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