Suunto D6 User Manual page 36

Table 5.1. Audible and visual alarm types
Alarm type
Short single beep
Three beeps with a three
second interval and activated
backlight
Continuous beeps and
activated backlight
You are able to preset alarms before the dive. The programmable alarms can be set
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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Dive computer is activated.
Dive computer automatically returns to the TIME mode.
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
permenant Error mode within three minutes, indicated
by a permanent Er symbol.
Alarm reason