A backplate and wing (often abbreviated as BP&W or BP/W), is a type of Scuba harness with buoyancy compensation device (BCD) worn by scuba divers. Unlike most other BCDs, the backplate and wing is a modular system, in that it consists of separable components. The core components of this system are:
- A harness, which attaches the system to the diver, and which may support other accessories.
- The backplate, a plate normally made from metal which sits against the diver’s back and to which the diver’s cylinder or cylinders are attached.
- An inflatable buoyancy bladder known as a wing, which is sandwiched between the backplate and the cylinder(s).
Read more about Backplate And Wing: Images, Differences From Other Styles of BCD
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—John Milton (1608–1674)