Translation guide
A device or system that provides GPS-based navigation and directions for a car.
Referring to the in-car GPS navigation device or system as a whole.
The most common and natural way to refer to a car navigation system in everyday conversation. Short for カーナビゲーションシステム.
I bought a new car navigation system.
A further abbreviation of カーナビ, very common in casual speech. Can also refer to navigation in general, but context usually makes it clear.
The car navigation system gave the wrong directions.
The full term, used in more formal or technical contexts, such as manuals or specifications.
This car is equipped with the latest car navigation system.
Let's set the navigation and go.