An input device for controlling buoyancy includes a means to control a second rate. The first input mechanism 81 may be used to select the second rate. It may also serve as a rate switch. You can also select the second rate by selecting the first rate. Depending on what circumstances exist, the buoyancy control device might include a number different features. One embodiment includes a buoyancy device and a weight belt.
Weight belts
Although the centre of buoyancy is out of the divers control, the suit weight and position of the cylinder can be adjusted by them. Additionally, divers may have the option to use weight belts or integrate BC weights to increase their control over their buoyancy. These buoyancy control devices can be worn at the waist, above your hips, and below your knees to give you a neutral trim.
Dump valves
Two ways can a BCD control your buoyancy. Either blow out the air bladder completely, or add air. Dump valves can be attached to a string to regulate the level of air. BCDs usually have one to two dump valves per shoulder. The dump valves are used to deflate the bladder during diving to maintain comfortable buoyancy.
Jacket-style buoyancy control device
Whether you're a new diver or have been diving for years, you may want to invest in a jacket-style buoyancy control device (BCD). BCDs come in many sizes and can be worn comfortably over swimsuits. Many models have rear trim pockets and weight pockets in the front, which makes it easy to access your weight. Jacket-style BCDs have a cushioned hardback that is comfortable and can be adjusted to adjust the buoyancy.
BC attachment systems
A BC vest is a type that scuba divers use to keep buoyant and prevent from sinking. The BC holds the diver and SCUBA tank in place. BCDs may look similar, but their functions and design can vary from one model to the next. It is important to know how to use your BC properly and make a backup plan in case of malfunction.
Changing depth is controlled by pneumatic valves
Pneumatic valves are the heart of most industrial processes. They regulate fluid flow using a force-balance principle. Three ports make up a pneumatic valve: an air supply port, a control signal output and an exhaust. Above the device to be controlled, a lever arm is placed. It is equipped with a flexible diaphragm that changes pressure when an external sensor varies its position. When the sensor's pressure rises, the left end of the lever arm lifts and opens the supply air valve. The controlled device moves when the pressure is higher.