in traditional Polynesian voyaging, the person who navigates the canoe using no instruments (M1)

Target screen

a destination area set in charting a navigational course in which the highest points of the destination islands will be visible (M1)


a long, often massive and crestless wave or succession of waves generated by weather events such as storms, and often continuing beyond or after the initial cause (M1)

Reference course

an ideal course based on average wind and current conditions, charted before beginning a voyage in a traditional Hawaiian canoe or another vessels (M1)


characteristic shape of coral and other animals in the phylum Coelenterata, somewhat flower-shaped with a cylindrical body attached at one end and opening at the other through a central mouth (M1, M4)

Nautical mile

a distance of 1852 meters (6076.115 feet), the length of a minute of arc of a great circle of the earth (M1)


the early, free-living form of any animal that changes structurally when it becomes an adult or undergoes metamorphosis (A4, M1)


one nautical mile per hour (M1)