A buoyancy control device has an input mechanism for a second ascent rate. You may select the second rate by using the input means 81. This may also be known as a rate selection button. Alternativly, you can select the second rate of ascent by bypassing the first rate. Depending on the circumstance, a buoyancy controller device could include several features. In one embodiment, the buoyancy control device comprises a buoyancy tank and a weight belt.
Weight belts
The centre buoyancy of divers is out of their control. However, they can adjust the suit's weight and the position of their cylinder. Additionally, divers may have the option to use weight belts or integrate BC weights to increase their control over their buoyancy. To maintain a neutral trim, the buoyancy control device should be worn at your waist, above your hips and below you knees.
Dump valves
You can use a BCD to regulate your buoyancy in two different ways. Either you can completely deflate your air bladder or add air to refresh it. Dump valves are typically attached to a string and allow you to control the air levels. BCDs typically have one to two dump vales on each shoulder. When diving, you can use the dump valves to deflate the air bladder to maintain a comfortable buoyancy.
Jacket-style buoyancy control device
You can invest in a jacket-style BCD, whether you're new to diving or have been diving since years. Many BCDs are designed to fit comfortably over the swimsuit, so the weight will stay in place. Many models have rear trim pockets and weight pockets in the front, which makes it easy to access your weight. A jacket-style BCD has a cushioned hard back that makes wearing it comfortable and allows you to easily adjust its buoyancy gauges.
BC attachment systems
A BC is an underwater vest that is worn by divers to prevent them sinking. A BC is used to secure the diver's SCUBA tank. BCDs may look similar, but their functions and design can vary from one model to the next. It is crucial to learn how to properly use your BC and to have a backup plan in the event of a malfunction.
Changing depth is controlled by pneumatic valves
Pneumatics valves are essential for most industrial processes. They use a force balance principle to control fluid flow. A pneumatic valve can have three ports: air supply, control signal output, exhaust. Above the device to be controlled, a lever arm is placed. It has a flexible diaphragm, which changes the pressure when an external sensor moves it. The left end of the lever arm lifts when the sensor's pressure is high and opens the supply valve. The controlled device becomes more mobile when the pressure increases.