Underwater, pressure increases by one atmosphere for roughly every how many feet of seawater?
Answer33 feet (10.06 m)
That rising pressure is why divers feel it in their ears as they descend.
Source: NOAA Ocean Service (2024) oceanservice.noaa.gov
Outdoors · Facts & sources
Scuba facts & stats
4 sourced facts about scuba diving, each with the context behind the number. 4 more are in today's round and appear here after it closes.
The basics
Going deeper
When was PADI (Professional Association of Diving Instructors) founded?
Answer1966
It was founded by divers John Cronin and Ralph Erickson.
Source: PADI padi.com
Expert level
What is the record for the longest open saltwater scuba dive?
Answer145 hr 25 min
Saddam Killany of Egypt set it in Dahab in 2020 after more than three years of planning.
Source: Guinness World Records (2020) guinnessworldrecords.com
About how many PADI professional members (instructors and dive leaders) are there worldwide?
Answer128,000
PADI divers train at about 6,600 dive centers and resorts around the globe.
Source: PADI padi.com
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