SDI SCUBA CERTIFICATION EXAM SCRIPT
2026 COMPLETE QUESTIONS AND CORRECT
SOLUTIONS
◉ List the 3 important scuba diving changes that occurred in the
1950s. Answer: dive tables, pdc [personal dive computer], enhanced
diving equipment
◉ Name 3 different devices that modern dive computers replace.
Answer: dive tables, gauges, audible and/or visual alarms
◉ What sets scuba diving international apart from other training
agencies? Answer: sdi understands the need for enhanced diving
equipment
◉ How much larger and closer do objects appear underwater and
why? Answer: 25%, in order for your retinas to stay focused
underwater there needs to be an airspace between your eyes and
the water
◉ How much faster does sound move through water than air and
why? Answer: 4 times faster. water is about 800 times denser than
air.
2026 COMPLETE QUESTIONS AND CORRECT
SOLUTIONS
◉ List the 3 important scuba diving changes that occurred in the
1950s. Answer: dive tables, pdc [personal dive computer], enhanced
diving equipment
◉ Name 3 different devices that modern dive computers replace.
Answer: dive tables, gauges, audible and/or visual alarms
◉ What sets scuba diving international apart from other training
agencies? Answer: sdi understands the need for enhanced diving
equipment
◉ How much larger and closer do objects appear underwater and
why? Answer: 25%, in order for your retinas to stay focused
underwater there needs to be an airspace between your eyes and
the water
◉ How much faster does sound move through water than air and
why? Answer: 4 times faster. water is about 800 times denser than
air.
