times during the dive. This is especially important for divers in poor physical
condition, in cold water or other arduous conditions.
Historically divers have been advised to always include a margin of safety in
their diving activities. TUSA supports these practices and strongly recom-
mends that the diver make the deepest portion of the dive near the beginning
of the dive and gradually progress into shallower depth, allowing time for a 3
to 5 minutes “safety stop” at a depth range of 3 to 6 meters (10 to 20 ft). This is
believed to be effective in further reducing the risk of decompression sickness.
Furthermore, the reader/diver is advised that any dive carries some risk of
decompression sickness and neither the authors, nor TUSA will assume any
responsibility or liability for accidents or injuries which might occur for any
reason.
2. GETTING ACQUAINTED WITH THE IQ-400
The purpose of this section is to provide the user with initial information to
preview the operation of the computer. Since this information is limited, it is
imperative that you read and understand the entire owner’s manual before
attempting to dive.
2.1 Water Contacts
The IQ-400 has three water contacts on the face of the instrument:
MODE/ PLAN: common contact -> LOG/ON
PLAN: activation and dive planning contact -> ON
MODE: time display and mode selection contact -> LOG
10
WARNING
READ AND UNDERSTAND
THE ENTIRE OWNER’S MANUAL BEFORE DIVING!
Failure to complete this step may result in serious personal
injury.
