Swift Operating Instructions
Page 7 Doc 57025-01 Rev G
Always use a backup pressure
gauge
Historically, wireless gas
pressure transmitters have been
reliable. However, like all other
electromechanical systems they
will eventually fail. When this
happens, they might report a
higher or lower gas pressure
than remains in a SCUBA
cylinder or they may report no
pressure at all.
Unlike a mechanical pressure
gauge, the failure of a
transmitter will normally
produce error messages on the
attached dive computer.
However, there could be failures that produce no error messages and result in a sudden
unexpected out of gas emergency that every diver must be prepared to manage.
Shearwater recommends using a backup submersible pressure gauge (SPG) as a redundant
source of gas pressure information and regularly confirming the agreement of the gas pressure
reading of the SPG and wireless transmitter.
USE A BACKUP ANALOG SPG
Always use a backup analog submersible pressure gauge
as a redundant source of gas pressure information.
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