1 navigation

1 scheduled flight

2 flight number

3 plane

4 scheduled sailing

5 sailing number

6 passenger ship

1 aviation

1 to return (to)

1 gone forever

1 (idiom) to safeguard (sth)

2 to protect (sth)

1 to have a long and hard journey (idiom)

1 to return without any achievement (idiom); to go home with one's tail between one's legs

1 ingrained habits are hard to overcome (idiom); bad old practices die hard

1 to recover one's youthful vigor

2 to feel rejuvenated (idiom)