https://kids.guinnessworldrecords.com en

First telephone call from the ocean floor to space

First telephone call from the ocean floor to space
Who
Sealab II, Scott Carpenter
What
First
Where
Not Applicable
When
29 August 1965

On 29 August 1965, during the Gemini 5 mission (on 21–29 August), the crew of Gordon Cooper and Charles Conrad received a radiotelephone call from Mercury astronaut Scott Carpenter. At the time Carpenter was on board Sealab II, at a depth of 62 m off the coast of California, USA. Carpenter spent 30 days living and working on Sealab II, during which time he performed research on physiology and salvage methods.