Objects underwater appear Study guides, Class notes & Summaries

Define SCUBA ~~> S - self C - contained U - underwater B - breathing A - apparatus List 3 important scuba diving changes that occurred in 1950s ~~> 1) published USN dive tables 2) invented the personal dive computer 3) equipment manufacturers made improvements to the design and workmanship of gear Name 3 different devices that modern dive computers replace ~~> 1) dive tables 2) J-valves 3) depth gauges What sets SDI apart from other training agencies? 2 | P a g e |...

Define SCUBA - S - self C - contained U - underwater B - breathing A - apparatus List 3 important scuba diving changes that occurred in 1950s - 1) published USN dive tables 2) invented the personal dive computer 3) equipment manufacturers made improvements to the design and workmanship of gear Name 3 different devices that modern dive computers replace - 1) dive tables 2) J-valves 3) depth gauges What sets SDI apart from other training agencies? - First dive training agency to...

What is visual reversal? - in very clear water objects appear further away due to the particles in the water that resembles haze over great distance An hour after surfacing from a deep dive, a diver complains of fatigue and numbness in one shoulder. This diver should seek medical attention because the diver may have: a. carried equipment that was too heavy. b. decompression illness. c. contaminated air poisoning d. overexertion - b Why does water absorb more heat than air? - - it is dens...

Define SCUBA - S - self C - contained U - underwater B - breathing A - apparatus List 3 important scuba diving changes that occurred in 1950s - 1) published USN dive tables 2) invented the personal dive computer 3) equipment manufacturers made improvements to the design and workmanship of gear Name 3 different devices that modern dive computers replace - 1) dive tables 2) J-valves 3) depth gauges What sets SDI apart from other training agencies? - First dive training agency to p...

NAUI SCUBA Exam Questions with Correct Answers Underwater basic physics - Answer-Density of H2O = 800X more dense than air Being underwater effects: How we hear sounds Bodies thermal capabilities aka faster heat loss Our ability to move And creates Drag Effect Need to knows about LIGHT underwater - Answer-Light is absorbed as depth increases Warm colors (Red Orange Yellow Green) fade Cool colors (Blue Indigo Violet Remain) Refraction occurs, objects appear 25-33% bigge...

Objects under water appear: 1: The same size as they do on land. 2: Twice as large as they do on land. 3: Closer and larger than they do on land. 4: Smaller and farther away than they do on land. - Closer and larger than they do on land. As you descend: 1: Colors appear to fade. 2: Reds and oranges are among the first colors to disappear. 3: At 30 m/99 ft, little color remains other than blues, grays, blacks and whites. 4: All of the above. - All of the above. Which of the following s...

Which of the following is not true? Divers should equalize: 1: Preemptively before descent. 2: Well before feeling any pain or discomfort. 3: As soon as they feel any pain or discomfort. 4: Early and often during descent. (Ans- As soon as they feel any pain or discomfort. Objects under water appear: 1: The same size as they do on land. 2: Twice as large as they do on land. 3: Closer and larger than they do on land. 4: Smaller and farther away than they do on land. (Ans- Closer and...

SDI Scuba Certification Exam Study Guide (2022/2023) Already Passed Define SCUBA S - self C - contained U - underwater B - breathing A - apparatus List 3 important scuba diving changes that occurred in 1950s 1) published USN dive tables 2) invented the personal dive computer 3) equipment manufacturers made improvements to the design and workmanship of gear Name 3 different devices that modern dive computers replace 1) dive tables 2) J-valves 3) depth gauges What sets SDI apart from other trai...

Define SCUBA - S - self C - contained U - underwater B - breathing A - apparatus List 3 important scuba diving changes that occurred in 1950s - 1) published USN dive tables 2) invented the personal dive computer 3) equipment manufacturers made improvements to the design and workmanship of gear Name 3 different devices that modern dive computers replace - 1) dive tables 2) J-valves 3) depth gauges What sets SDI apart from other training agencies? - First dive training agency to p...

Define SCUBA - answer-S - self C - contained U - underwater B - breathing A - apparatus List 3 important scuba diving changes that occurred in 1950s - answer-1) published USN dive tables 2) invented the personal dive computer 3) equipment manufacturers made improvements to the design and workmanship of gear Name 3 different devices that modern dive computers replace - answer-1) dive tables 2) J-valves 3) depth gauges What sets SDI apart from other training agencies? - answer-First ...