You mean 'underwater' (one word)
You can only dive into water. But I guess you want 'Scuba-diver' ?
or is your question this:
What do you call someone who does 'snorkelling' ?
Without breathing, the world record is 22min With air bottles (scuba diver) or in a submarine you can of course stay longer. In a submarine when you have enough supplies, you can stay virtually forever under water.
Applicants must be proficient in Microsoft Word and Excel. he's a highly proficient diver.
Rule of thumb is that each 33 feet adds an atmosphere of pressure. At sea level, 1 atmosphere, at 33 feet, 2 atmospheres, at 66 feet, 3 atmospheres, at 99 feet, 4 atmospheres, and at 132 feet, 5 atmospheres. A diver at 132 feet has 5 atmospheres of pressure on him.
the swimer
It depends on the density of the object that weighs one pound, and how much of it is under water. The object will weight 1lb - water density * object volume under water; If the object is on average is less dense the water (i.e. is buoyant), and is allowed to swim, its weight will be 0 because proportion of its volume under water will compensate gravity exactly.
diver deep sea diver dolphin trainer
isn't it a scoober diving kit?
Aqualung.
Oxygen Tank + mask
A scuba diver.
diver
You would blow up from water pressure.
The diver dove into the water off the diving board.
aqualung, snorkle, SCUBA tank
a breathing tank! try it its fun! (underwater swimming)
A typical diver watch is water resistant in depths of about 200 - 300 meters. Diver watches are made of high grade materials able to withstand the change in atmospheric pressure under water and with proper care can easily be used in salt water and fresh water applications.
A diver is underwater in the area. Stay at least 100 ft away.