| Term | Definition |
| Navigation | The art of navigating |
| Compass | An instrument that determines the direction you are facing |
| Strait | A narrow passage of water connecting two large bodies of water |
| Port | A place where ships dock, a harbor |
| Cloister | Any quiet, secluded place |
| Rancid | Offensive or nasty, disagreeable |
| Natives | The original people group to inhabit a certain place |
| Viceroy | A person appointed to rule a country or province |
| Eclipse | The blocking of the light of one celestial body by another celestial body |
| Astrolabe | An instrument used for taking the altitude of the sun or stars |
| Latitude | The lines that go parallel to the Meridian |
| Longitude | The lines that go parallel to the Equator |
| League | A certain amount of distance, roughly 3 miles |
| Lateen Sail | A triangular sail on a long sloping yard |
| Rigging | The ropes, chains, etc, used to support and work the sails, etc. |
| Caravel | A small Spanish or Portuguese ship of the Middle Ages and later, usually Lateen-Rigged |
| Amplitude | Mental range, scope, or capacity |
| Reckoning | The settling of two accounts, as between companies |