During the great age of exploration, sailors navigated the ocean deep. They used the positions of the stars to find their latitude, and when good chronometers were invented in the 18th century they were able to determine their longitude as well. In May 2019, I will be leading a modern-day, one-week navigational exploration, a board the Royal Caribbean’s Harmony of the Seas, where I will help you learn the stars and constellations, including Alpha Centauri and the Southern Cross, stars which can only be found in the southern heavens. We will also visit the Mayan ruins of Tulum and Kohunlich, and I will share with you the astronomy knowledge of the Maya and their careful observations of the sky that helped them keep track of the calendar and the motion of planets. This is all part of Indian River State College’s Study Abroad program. We depart from Port Canaveral on May 26, 2019 and return on June 2nd. If you’re interested in this classroom at sea, call me at 772 462-7515, or e-mail me at firstname.lastname@example.org.