juan ponce de leon,
ponce de leon Spanish explorer who accompanied Columbus on his second trip in 1493; in 1513 he discovered Florida while searching for the legendary Fountain of Youth (1460-1521)
navigator -
the member of an aircrew who is responsible for the aircraft's course
A navigator is the person on board a ship or aircraft responsible for its navigation. The navigator's primary responsibility is to be aware of ship or aircraft position at all times. Responsibilities include planning the journey, advising the Captain or aircraft Commander of estimated timing to destinations while en route, and ensuring hazards are avoided.