Tare Control During Diving - Scuba Force EXPLORER NST Owner's Manual

DRY SUIT OWNER MANUAL
• To check your weight, go to a supervised body of water, fully clothed with a
diving device, dry suit and protection against the cold.
• To release all air from your drysuit, take a vertical position in the water and
fully open the suits vent valve by turning it fully counterclockwise and as far as
possible. Raise your elbow so that the vent valve ist he highest point of the
drysuit.
• Deflate your BCD until you are neutrally tared with a full lung. As you exhale
you will slowly sink. When you are neutrally tared, only the top of your head
will stick out of the water.
• If you are not neutrally tared and continue to sink, adjust your weight until you
are neutrally tared with the BCD completely empty.
• Once you have reached neutral buoyancy with a full bottle and a completely
empty BCD, add extra weight to compensate fort he weight loss with a nearly
empty bottle. See the table below for the approximate weight that must be
added.
Buoyancy check while diving
Dry diving requires buoyancy and trim controls. Both require control of the gas
volume in your drysuit. The gas volume ist he air bubble that moves freely in your
suit. Thos volume of gas is not part of the air that is trapped in the undergarment.
The guest volume adds little to nothing to the overall isolation. However, this
wandering air bubble always moves to the top of the drysuit.
If the wandering bubble is too large, it can lead to trim issues, such as a feeling that
the legs are always floating upwards. The diver can measure the size of the bubble
by rotating the body to a vertical position and holding one arm above his head. This
allows the free air to flow into the sleeve. The drysuit will fit snugly around the arm
until it reaches the air bubble. If the bubble is larger than half the length of your
forearm, it is too big. It is best to keep the bubble small and, once it starts geting
bigger, deflate the excess air and add air into the BCD to give you neutral buoyancy.
In a vertical position on the surface of the water with your head out of the water, you
will find that there is more pressure on your legs than on your chest. This normal in
wate ras soon as your head is higher than your legs.
The drysuit should feel like it is pressing evenly and gently against your body.
Although the feeling is very different compared to a wetsuit, you will not feel it after a
few dives or when you are in a horizontal position.
Manual Version DS2019-1 Page 31 of 45