A tourist?
An Aquatic Nomad
a naturist
Prank like a joke! A Crank call is made for the purpose of annoying, upsetting, or threatening someone.
A vessel that travels underwater is termed a submarine.
A call out is an incidence of someone being summoned for a purpose, or a meeting or rally held to find participants, for example for a sports team or a specific activity.
I would call it "the speed of the wave".
corps of discovery 1804-1806
The purpose of writing "Call It Courage" by Armstrong Sperry was to tell a coming-of-age story about a young boy named Mafatu who overcomes his fears and proves his bravery. Through Mafatu's journey, the book explores themes of courage, independence, and self-discovery.
An astronaut.
rays.
medium?
Motorist