What the Text says
what I Already know
Inference
Now the Coast Guard
monitors oil tankers via
satellite until they have
reached safe water.
Satellites can see
things that the human
eye cannot see.
Satellites can sometimes experience interference in space, so the Coast Guard also uses
boats.
Information from satellites will help a ship's crew know when they are moving too far off their
route.
Information from satellites will help a ship's crew forecast the weather during their trip.
Satellites can help to ensure that tankers enter only the ports of friendly nations.