History Flashcards
Navigation
the act or process of navigating.
the art or science of plotting, ascertaining, or directing the course of a ship, aircraft, or guided missile.
Exploration
an act or instance of exploring or investigating; examination.
the investigation of unknown regions.
Patron
Pay for ships
Caravel
a small Spanish or Portuguese sailing vessel of the Middle Ages and later, usually lateen-rigged on two or three masts.
Ivaos
A tample
Cross-staff
an instrument for measuring the angle of elevation of heavenly bodies
Compass
an instrument for determining directions
Astrolabe
An instrument for taking the altitude of the sun or stars
Quadrant
a quarter of a circle; an arc of 90°.
Scurvy
A disease marked by swollen and bleeding gum
Hardtack
a hard, saltless biscuit, formerly much used aboard ships and for army rations.
Log line
The line by which the log is trailed from a ship to determine its speed.
Curtographer
Map maker
Portalon chart
Portolan or portulan charts are navigational maps based on compass directions and estimated distances observed by the pilots at sea.
Clinker built
Having external planks which overlap downward are secured with clinched nails.
