by boat

The only way in or out of the town was by boat.

The only way to get here is by air or boat.

The best way to see the city is by boat.

At first, the only way to get here was by boat.

The only way on and off the island is by boat.

He said that his plan to leave by boat would not change.

Second, the only way to get to them remains by boat.

The trip from there takes about 25 minutes by boat.

Only way to reach this light house is by boat.

Finally he decided to take to the land himself, leaving his company to follow after him by boat.