SUUNTO SPYDER - Manual (Page 42)

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The SLOW warning alternates with the current depth. The SLOW warning is
an indication that the maximum ascent rate has been exceeded continuously,
whereas the ascent rate indicator shows present ascent speed.
Whenever the SLOW warning appears, you should immediately slow down
or stop your ascent until the warning disappears. You must not ascend shal-
lower than 3 m [10 ft] with the SLOW warning on. If you reach this depth
with SLOW on, you must stop at this depth and wait until the warning disap-
pears.
Fig. 4.16 Ascent Rate
Indicator. Two segments
shown: ascent rate 6 - 8 m/
min [20 - 26 ft/min].
Fig. 4.17 Ascent Rate
Indicator. Three segments
shown: ascent rate 8 - 10
m/min [26 - 33 ft/min].
Fig. 4.18 Ascent Rate
Indicator. Blinking SLOW
and four segments shown:
ascent rate is more than 10
m/min [33 ft/min]. This is a
caution to slow down!