You should take extra care, particularly when travelling by boat.

I might have declined if I'd known he was going to travel by boat.

We travelled first by boat, and planned to spend the night at a hotel on the other side of the lake.

You can travel between the three islands by boat.

Another reason is that they can travel by boat since there no roads.

From the third box teams had to travel by boat but only two could travel at a time.

The couple loved traveling together, especially in the winter months, by plane, boat, and car.

It was about three miles away, if one were traveling by boat.

In the delta itself only travel by boat is possible.

And we are even more thrilled to be traveling by boat.