Many Explorers did not use a ship. Marco Polo would be but one.
they had a distorted map
compasses guides maps
They dumped their business over the side of the ship when they were at sea.
Caravels.
Sailing ship. It was the only way available then to cross the oceans.
a caravel
Compass, sextant (or astrolabe), & timepieces.
Auto-CAD software, like Ship Constructor, is used in ship building.
Viking long boat
He used a stick and a napkin
the Europeans used the Caravel to explore and the ship was invented in the 13th century