by ship

By ship, he can get them in a little over two months.

The Met has not sent anything by ship since the late 1970's.

A letter had just come from your Father by military ship.

They lived inside the mountain until their work was done and then left by ship.

Most of my getting about is by train and ship.

Transportation to the outside world is by ship or air.

You might want to send more than one letter by different ships, though.

The more popular route between York and the south was by ship.

The way to Amsterdam in those days was by ship.

If it comes to the worst we could travel by ship.