The sextant
The compass and the astrolabe made navigation by sea, and therefore exploration, possible.
a map if it has a compass rose on it
Some technological innovations during China's golden age include the invention of gunpowder, which revolutionized warfare; the development of papermaking techniques, which improved communication and education; and the invention of the compass, which transformed navigation.
The compass. The ancient Chinese invented the compass and revolutionized maritime (ocean / water) navigation.
a magnetic compass And a "astrolobe " which was a basic navigation tool that allowed him to get a rough idea of his location on the earth, from a sun sighting at noon, each day.
The compass.
The compass.
Compass
A compass fits this definition.
the compass and the astrolabe.
Compass Rose
A compass is a very useful navigation device, without it you may get lost.