sdi scuba training chapter 1 Questions and Answers with complete solution

How much lar When diving from a shore, the best time to dive is when there is the least amount of tidal current. BLANK tide is when there is no horizontal water movement. - ️️BLANK=slack ger and closer do objects appear underwater and why? - ️️25%, in order for your retinas to stay focused underwater there needs to be an airspace between your eyes and the water What does scuba stand for? - ️️self contained underwater breathing apparatus Name 3 different devices that modern dive computers replace. - ️️dive tables, gauges, audible and/or visual alarms How much faster does sound move through water than air and why? - ️️4 times faster. water is about 800 times denser than air. What is the first color to be absorbed in water? - ️️red If you are caught in a rip current, first swim BLANK to the current to get out of it before swimming towards shore. - ️️BLANK=parallel Waves are usually caused by BLANK. - ️️BLANK=wind Anticipate surge action to avoid contact with stationary objects. TRUE or FALSE? - ️️TRUE What types of marine life cause most diving injuries? - ️️fire coral, jellyfish, fish on the sea floor. List 3 different reasons that it is advisable to check with your local dive center before conducting a dive in an area you are unfamiliar with? - ️️knowing the rule policy, expectation of what you will encounter, and what first aid to bring What sets scuba diving international apart from other training agencies? - ️️sdi understands the need for enhanced diving equipmentWhat should you do if you see a potentially dangerous animal on the sea floor and it does not leave the area? - ️️avoid toughing sea life, and always respect the environment List the 3 important scuba diving changes that occurred in the 1950s. - ️️dive tables, pdc [personal dive computer], enhanced diving equipment