내비게이션 지문에서 흐름과 관계없는 문장은 뭘까요?

흐름과 관계없는 문장을 찾는 문제예요.
Have you ever heard an on-board navigation system will be standard equipment on new car?
1. It includes a computer for the dashboard and an antenna linked to 24 satellites.
2. Your position is pinpointed exactly and plotted on a map.
3. If you are lost, you can stop and ask a gas station attendant for directions.
4. You type in where you want to go—for example, 123 Cherry Street, Metro Airport, or the art museum—and then the computer does the rest.
5. It calls out commands as you go along and tells you when you have turned off course.