Aqua Lung Apeks Regulator - Manual (Page 33)

US
33
The second stage incorporates a deflector to minimise the effects of
strong currents on the diaphragm, however, if you swim underwater
in an upside down or sideways position, or facing a strong current,
you can turn the inhalation control knob back “in” (clockwise), to
desensitise the opening effort to prevent any freeflow.
At the end of your dive, be sure to return the IVS/RVS switch to the
MIN (–) position, and turn the inhalation control knob “in” when you
have arrived at the surface.
WARNING: Deep diving requires special training and
equipment, and greatly increases your risk of decompression
sickness and other serious diving injuries. If you attempt to
dive beyond prescribed no-decompression limits without first
obtaining sanctioned technical dive training, you risk serious
injury and death.
Diving In Cold Water
The C.E.N. standard defines cold water as 10ºC (50ºF) or lower. In
such conditions, there is a risk of freeze-up; particularly in fresh water,
which has a higher freezing point and more severe thermoclines.
Incidents of first or second stage freeze-up usually result in freeflow
from the second stage, resulting in a rapid loss of air.
Before attempting an unsupervised dive in cold water conditions, it is
important for you and your buddy to obtain certified training in cold
water diving techniques, and to use only equipment which has been
specifically designed and maintained for such use. If these precautions
are not taken, freeze-up can occur.Any equipment marked with the
greater than 10°celcius symbol; (> 10°C) are only suitable for water
temperatures above 10°C or 50°F.
Regulator Owner’s Manual
............................................................................................