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True or False. When an alien (invasive) species is introduced into an ecosystem, it may have no natural enemies, which allows it to quickly multiply and possibly overtake and kill off native species. - True. Flying after diving recommendations suggest that divers wait __________ hours after compl...

The first, and most important way you reduce risk by adhering to PADI standards is that you reduce the risk of an ___________ in the first place. - accident When managing an emergency situation, when delegating tasks one advantage you have as dive master is that - people expect you to take charge...

When evaluation dive conditions , what factors do you need to consider? a. Visibility b. Wind, rain, and temperature? c. Currents and tides. d. All of the above - True or False. Having a large knowledge and experience base makes it easier for an expert to identify cause-and-effect relationship...

You are assisting an instructor in open water with a class of four Open Water Diver students. The instructor conducts an ascent skill with one student. Your likely function is to: a. make the ascent with the instructor for added control. b. stay with and supervise the remaining student divers. c...