SDI

Name 3 different devices that modern dive computers replace (Ans- 1) dive tables 2) J-valves 3) depth gauges What sets SDI apart from other training agencies? (Ans- First dive training agency to provide entry level scuba instruction that incorporates the use of personal dive computers --> more streamlined scuba course w/ more instruction time in the water How much larger and closer do objects appear underwater and why? (Ans- Objects underwater appear 25% larger and 25% closer...

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...

True or False. Dive computers work by monitoring the presences of so-called 'silent bubbles using ultrasound. (Ans- False What may happen if you go too deep or stay too long? (Ans- You may not be able to make a direct ascent to the surface without substantially increasing your risk of decompression sickness and your dive computer may require you to make a series of decompression stops A decompression stop is: (Ans- Pausing at a fixed depth for a specified period of time to allow exc...