Chapter 2 Oceanography

A center of trade

A center of learning

A center of politics

A center of religion

To measure temperature

To determine time zones

To serve as a frame of reference for positioning and navigation

To calculate distance from the sun

Lines of latitude are always the same distance apart, but the distance between two lines of longitude varies with latitude

Lines of longitude are always the same distance apart, but the distance between two lines of latitude varies with longitude

Both lines of latitude and longitude are always the same distance apart

Neither lines of latitude nor longitude are ever the same distance apart

The Prime Meridian

The Equator

The Tropic of Cancer

The Tropic of Capricorn

Use of stars

Use of maps

Use of compasses

Use of GPS

Between 1000 and 1200 C.E.

Between 450 and 600 C.E.

Between 800 and 900 C.E.

Between 300 and 500 C.E.

100 feet

200 feet

300 feet

440 feet

Central rudder

Side rudder

Rear rudder

Top rudder

15 meters

23.3 meters

30 meters

40 meters

Central rudder

Triangular sails

Long-distance voyaging

Use of windlasses