Why does a diver need a buoyancy control device?

A skin diver need a........?

A skin diver needs essential equipment such as a mask, snorkel, and fins to enhance their underwater experience. Additionally, a wetsuit may be required to provide thermal protection in colder waters. Safety gear, like a buoyancy control device and a dive knife, can also be important for ensuring safe and effective diving. Proper training and knowledge of diving techniques are crucial for a successful and enjoyable dive.

What equipment does a deep sea diver need?

A deep sea diver typically needs specialized equipment including a diving suit, which can be either a wetsuit or a drysuit, depending on the conditions. They also require a reliable breathing apparatus, such as a scuba tank or a rebreather, to supply oxygen underwater. Additionally, divers use fins for propulsion, a weight belt for buoyancy control, and gauges to monitor depth and air supply. Safety equipment like a dive knife and a communication device may also be essential, especially for deeper dives.

How is buoyancy used by scuba divers?

SCUBA divers control their buoyancy to keep off the sea floor or from floating up to the surface, to avoid obstacles both above and below them, and to have a more relaxing dive with minimal physical effort. As a diver changes depth, they need to either add or release air from their buoyancy compensator (BC or BCD) to maintain neutral buoyancy. A diver in control of their buoyancy can move through the water with minimal fin input and breath control making the dive a lot more enjoyable (not to mention longer due to not using a lot of air inefficiently to maintain buoyancy control). Buoyancy is not really used by scuba divers, but it does act against them. Since the human body and the gear during scuba diving is held up by the water, especially at farther down depths of the ocean, where the water is more dense because of the weight of the water and the air holding it down. Because of the buoyancy, the divers have to wear weights to offset this buoyancy. Since in scuba diving you use wetsuits, and since these suits have nitrogen bubbles to assist insulation, this makes you float even more. And since your cells contain lipids and other materiels that are lighter than the water, this makes you float even more. This means that scuba divers must use weights to offset the buoyancy.

What types of dive gear are best for hobbyist divers?

Diving equipment should be comfortable, reliable and easy to operate, regardless of how often you dive. Typically, a diving mask, regulator, Buoyancy Control Device, weight belt, wet suit will be required if you area keen hobbyist diver. Whatever your financial position, you will also need a submersible pressure gauge (SPG) and compass. See this link for more suggestions: http://searchwarp.com/swa44461.htm

Why do the fish have a swim bladder?

The swim bladder is in animals that need something to help control their buoyancy. Sharks do not have swim bladders because they do not need this.

What is the best way to check the buoyancy of your pfds?

Wear the PFD in shallow water or a swimming pool.

Why does a scuba diver need more weight in the ocean than in fresh water?

A scuba diver needs more weight in the ocean than in fresh water because salt water is denser than fresh water, making it more buoyant. The additional weight helps the diver sink and maintain a neutral buoyancy underwater.

How does a scuba diver control their depth?

WARNING: A BIT OF MATH FOLLOWS A diver's buoyancy is determined by the mass of the water they (and their attached equipment) displace. Water density varies with temperature and salinity, but a good rule of thumb is that 1 cubic meter of water "weighs" about 1029 kilograms. That pencils out to about 64 pounds per cubic foot. A typical diver displaces about 2.5 to 3 cubic feet of water. That's equivalent to about 160 to 192 pounds of sea water. Let's assume the diver displaces 2.5 cuft of water. That means that the water they displace will "support" 160 pounds. If the diver weights less than 160 pounds, she'll be positively buoyant and will float. If she weights more, she'll be negatively buoyant ad will sink. The ideal circumstance that a diver strives for is to be neutrally buoyant, so no energy is expended to keep from sinking or floating. If our diver and her gear weigh 160 pounds, she'll be neutrally buoyant. In practice, our diver will carry enough weight to make her approximately neutrally buoyant. If she inhales air from her scuba cylinder, her chest cavity will expand, displacing a higher equivalent weight of water, and she'll ascend. If she exhales, she'll displace less water, and will descend. This ideal neutrally buoyant state allows a diver to ascend and descend with minimal effort. In practice, however, things are constantly changing during a dive. Wetsuits compress with depth, meaning the deeper our diver goes, the less water she'll displace. So as she descends, she'll have a tendency to descend more quickly. Her scuba cylinder displaces a constant amount of water, but the more air is used, the less it will weigh. This means that our diver will have a tendency to become more positively buoyant... she'll "float" more... as the dive progresses. In order to adjust for all of these variables, divers wear a "Buoyancy Compensation Device" (BCD). This is generally a vest shaped bladder that can be inflated using air from the scuba cylinder. It is fitted with a dump valve that allows fine tuning of the amount of inflation, and thus the amount of water it displaces. During a dive, our diver will adjust the amount of air in her BCD to maintain neutral buoyancy. Then she'll use her breathing to make fine adjustments in her vertical position. Divers diving in colder environments will often use a dry suit in place of the wet suit worn by most recreational divers. This dry suit is filled with variable amounts of air from the scuba cylinder, much the same way a BCD is. A dry suit can be used alone, or together with a BCD, to control buoyancy. In all cases, a diver will use a depth gauge, or a dive computer which measures depth, to monitor their depth throughout a dive.

Do you need an experience or talents to become a diver?

you need a girlfriend

What three things do electric hardware devices need in order to functions?

Each hardware device needs a method to talk to the CPU, software to control it, and electricity to power it.

What equipment do I need to scuba dive?

Diving mask, demand valve of the diving regulator, buoyancy compensator inflation and vent valves and depth guage. An alternate buoyancy compensator vent valve and shoulder straps of the BCD, which can be released by another diver in case of emergency Crutial that�s not mentioned� the contents gauge displaying remaining pressure in the diving cylinder - showing 150 bar

What does BCD mean?

BCD actually stands for "Buoyancy Control Device". It is the device that often looks like a cross between a life jacket and a waistcoat that a Scuba diver wears on top of his/her wetsuit. It has a whip (hose) connected to the divers first stage (this is the metal piece that attaches to the top of the divers cylinder). This whip carries air at 1 Bar above the ambient pressure to the diver BCD. When the diver is in the water he/she may need to press a button on the BCD to inject air from the cylinder to the BCD thus aiding the diver in controling buoyancy. The diver usually needs to be neutrally buoyant in the water so the BCD is used to do this. There is also a "Dump valve" on the BCD to dump air. When a Scuba diver enters the water you may see him/her holding a hose in their arm upright as they first leave surface. This is the dump from the BCD to force the air out to aid decent. There is also an additional independent cylinder on the BCD to do inflate so that the breathing air does not need to be consumed. I have been a professional diver on the oil industry for over 18 years so I hope I have explained the answer to your question properly. Greg---BCD (Binary Coded Decimal) in computer programming is a method of storing decimal numbers in a binary form. Each byte (8 bits) of data is divided into two 'nibbles' (four bits).Each nibble of data can store the number 0 - 15 in decimal in it, however using special assembly language op codes, each nibble of data can be forced to set the carry bit in the status register and zero its contents when it increments past the decimal value 9. This allows for decimal notation in a binary system.BCD numeric systems were originally used in the late sixties and early seventies in calculators using a four bit accumulators and in electronic clocks but these days programmers rarely use the method.---