What are the two types of diving?
Diving can be divided into two large categories: scuba diving and freediving. While freediving is done at breath-hold, scuba diving requires a breathing apparatus. There are many different types of scuba diving, each defined as either recreational or professional.
Where did the diver down flag originate?
The now-familiar red-and-white dive flag was invented in the early 1950’s by Denzel James “Doc” Dockery from Michigan. In 1953, he followed instructions published in Popular Science magazine for building his own scuba unit, and began experimenting with ways to make a living in the brand new sport.
Which of the following accurately describes the Divers-Down symbol?
Diver-Down Symbol: The divers-down warning device must contain a divers-down symbol. The symbol is a red rectangle or square with a white diagonal stripe. If the symbol is rectangular, the length may not be less than the height or more than 25% longer than the height.