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Get certified with confidence using this verified 2025/2026 SSI SCUBA Open Water Study Guide. Learn why equalization is vital for pressure balance, understand that body heat is lost 25 to 30 times faster in water than air, and master key metrics like 4 ata of absolute pressure at 99 feet in salt water. Ideal for first-time divers and certification candidates aiming for total mastery. Português: Guia de estudo SSI com respostas sobre pressão, perda de calor e equalização para mergulhadores. Español: Guía verificada de buceo SSI sobre presión, pérdida de calor corporal y técnicas de compensación. Italiano: Guida allo studio con risposte corrette sulla pressione assoluta, equalizzazione e sicurezza in immersione. Tags: SSI scuba guide, equalization in diving, 4 ata at 99 ft, heat loss underwater, diving certification, UCSB, verified 2025
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The purpose of equalization is to - ✔✔Introduce additional air into body air spaces in response to increasing external pressure Body heat is lost ________ than in air - ✔✔25 to 30 times faster The absolute pressure expressed in terms of atmospheres absolute at 99 feet in salt water - ✔✔4 ata One atmosphere of pressure is defined as - ✔✔
Earplugs... - ✔✔should never been worn while diving If you experience pain in your ears during descent: - ✔✔Stop the descent and ascend until the pain stops Which of the statements concerning sound transmission underwater is correct? - ✔✔- Divers find it difficult to locate the direction of a sound producing source
Which of the following over expansion injuries can be characterized by swelling in the neck area with a crackling sensation upon touching the swollen area? - ✔✔Subcutaneous emphysema The most serious lung overexpansion injury is: - ✔✔Aretrial Gas Embolism Which of the following would be inappropriate treatment for a diver exhibiting symptoms of Decompression Sickness? - ✔✔taking the victim back underwater The best prevention for decompression sickness is to: - ✔✔Plan your dive and dive your plan In air at 1 ata, the partial pressure of nitrogen is___, oxygen is_____. - ✔✔0.79/0.21 ata Decompression sickness occurs when: - ✔✔-A diver stays at depth for too long or surfaces too quickly
Over expansion injuries can be prevented by: - ✔✔-Learning correct breathing patterns
The recommended max ascent rate is: - ✔✔30 feet per minute Residual nitrogen is defined as: - ✔✔Residual nitrogen is the amount of excessive nitrogen dissolved in our bloodstream and tissues after a dive and all previous dives in a series Rip currents are formed by: - ✔✔water breaks over sand bars and reefs near the beach and recedes through channels or cuts in the bars and reefs It is OK to share a computer with your dive buddy (T/F) - ✔✔false a good diving buddy - ✔✔- makes diving more fun
Two examples of hard corals are: - ✔✔Elkhorn & Staghorn If a diver is injured by harmful sea life it is often because: - ✔✔-the diver's aggressive behavior