SUUNTO D3 - Manual (Page 6)

4
WARNING
Use back-up instruments. Make sure that you use back-up instrumentation
including a depth gauge, submersible pressure gauge, timer or watch, and
have access to decompression tables whenever diving with a bottom timer.
WARNING
Perform pre-checks. Always activate and check the device before diving in
order to ensure that all Liquid Crystal Display (LCD) segments are com-
pletely displayed, that the device has not run out of battery power, and that
the oxygen, altitude and personal adjustments are correct. Also, exit the Data
Transfer mode before diving, as the computer does not automatically revert
to Dive mode from Data Transfer mode.
WARNING
Freediving after scuba diving is not recommended. It is recommended to avoid
freediving for at least two hours and not to exceed fi ve meters [16 ft] after scuba
diving depending on your diving activity.