NASA astronaut <a href="https://en.wikipedia.org/wiki/Rusty_Schweickart" class="extiw" title="en:Rusty Schweickart">Russell L. Schweickart</a>, lunar module pilot of the <a href="https://en.wikipedia.org/wiki/Apollo_9" class="extiw" title="en:Apollo 9">Apollo 9</a> mission, on the deck of the NASA Motor Vessel <i>Retriever</i> prior to water egress training in the Gulf of Mexico.  NASA photo S68-54812 in public domain.
NASA
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