In WWII an airplane would be useful to bomb the other countries.
To rescue people from a sinking boat
Traveling across the world? lol or even in the same country
Mainly for long distance travel and fuel efficiency.
They are useful for takeoff to get lift and at landing for slowing down the plane.
I think that's airplane traffic updates are very useful. It has helped me alot when i was going on holiday.
I don't know if I would use it in a car, but on a boat, or an airplane, it seems as though it would be useful. I think a laptop is a bit much for a car ride, but I hear they are pretty accurate and keep good GPS locks for the whole trip.
On an airplane.
An airplane, because it starts with a vowel sound. (In the UK you would say an aeroplane.)
With airplane... There are 2 airports that are useful for the goal: Paphos and Larnaca.
the airplane was first because what would the parachute be needed before the airplane? Correct answer is airplane!(:
what ever country the airplane was above
Tools, materials, skills, time, and a place to be. A set of building instructions would probably be useful, unless your skill set doesn't cover aeroplane design too.