Buoyancy Control Devices

By Raymond Greenlaw
 Buoyancy Control Device
 Buoyancy Compensator Device
 Buoyancy Compensator (BC)
•Understand the buoyancy concept
•Explain BCD purpose
•Understand the parts and features of a BCD
•Explain how a BCD functions
•Learn about BCD Care
•Know considerations for selecting a BCD
Allows you to control whether you
• float on the surface
• hover in the water
• sink to the bottom
•Over pressure relief value
• Inflator/deflator hose
• Power-inflator mechanism
• Deflator/oral inflator value
• Dump value
 Integrated weight system
 D rings
 Clips
 Pockets
 Grommets to attach items
•BCD has an air bladder
• Adding air to the BCD cause a diver to be more
• Note when adding air underwater via the power
inflator short bursts should be added. One
should not hold down the power inflator button.
• Releasing air causes a diver to be less buoyant
•Always rinse a BCD thoroughly in fresh water
• Store a BCD with some air in the bladder so the sides
do not stick together
• When diving in a pool, rinse BCD extra thoroughly as
chlorine can have a negative effect on the materials a
BCD is made from
• Do not use cleansers on a BCD
•Consider having BCD inspected and cleaned by a
professional periodically
• Comfort and fit
• Weighting system
• Features
•Trim possibility
•Inspect any rental BCDs carefully
NAUI Scuba Diver, 2010.
•Figures borrowed from around the web, please let
me know if any of the figures are not in the public
domain and I will replace them.
• Thanks
for attending!
• www.raymondgreenlaw.com

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