What is the golden rule of scuba diving?
If you had but 30 seconds to teach someone to scuba dive, what would you tell them? The same thing Mike did — the Golden Rule of scuba diving. Breathe normally; never hold your breath. The rest, in most cases, is pretty much secondary.
How long can you dive at 200 feet?
According to the U.S. Navy Dive Table 5 (1999), five minutes of bottom time at 200 feet requires 7:40 of mandatory decompression at 10 feet.
How long can you dive at 100 feet?
According to U.S. Navy dive tables, a diver on air at 100 feet reaches his or her no-decompression limit and must come up after 25 minutes, regardless of how much air is left in the tank. At 60 feet, the diver’s maximum time would be one hour.