It maintains orientation.
Thus it may act as a form of compass,
or as the basis of a device that keeps track of all the turns you make.
humid measurement tool
Aviation navigation
Navigation aids are such items as map, compass, gyroscope, and today items such as a GPS system.
It's not necessary at all. But the fact that it can be usedas a navigational tool makes it quite useful.
It works with a big ball sack on a chin
The iPad 2 and 3 have a six axis electronic gyro built in. Many apps use the gyro for navigation and game control.
microelectronic sensors for rotation (gyroscope) and linear motion (accelerometer) are integrated by a microcomputer to provide the direction and speed for navigation (like cars), but are able to provide attitude information for say looking at the stars and constellations.
All I know is that if the Gyroscope's wheel is heavier it will precess faster and if it spins faster it will precess slower. But I'm not sure if slower or faster precession creates a more stable gyroscope.
Compass
A compass fits this definition.
they envented a navigation tool called the magnetic compass.
they envented a navigation tool called the magnetic compass.