SUUNTO Zoop - Manual (Page 60)

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Once in the permanent Error Mode only the ER warning is shown in the center window.
The dive computer will not show times for ascent or stops. However, all the other dis-
plays will function as before to provide information for ascent. You should immediately
ascend to a depth of 3 to 6 m [10 to 20 ft] and remain at this depth until air supply
limitations require you to surface.
After surfacing, you should not dive for a minimum of 48 hours. During the permanent
Error Mode, the Er text will be displayed in the center window and the Planning Mode
will be disabled.