In a tenths situation is when sky divers use decimals.
ANSWER:Metal helmets are still in use by professional divers. Many consider the metal helmet to be safer than SCUBA gear.
Mask, fins, snorkel, knife, tank, bcd (buoyancy control device), wetsuit, weight belt, regulator, pressure gauge, depth gauge, etc.
Many people use a SCUBA suit for diving. Sport divers, police divers and some Navy recovery divers.
You can breathe underground by using submersible breathing aparatus similar to scuba gear used by divers.
Shamwow!
Many scuba stores sell scuba diving cameras. Check a scuba gear stores in your area. This will allow you to compare cameras and get advise from fellow scuba divers.
Divers use 21% Oxygen and 79% nitrogen while underwater. It results in the same exact air we breath on the surface.
To use it in that form, you could use it as a command. For instance, Dive into the water. To use it in another way, you would have to change the verb tense to "dove" or "diving" or something else like that.
they need protection from stuff
The army of which country?
Gravity.