He always greets politely.

He visits our store every week.

Suddenly, a severe thunderstorm hit the town.

He explored the deep sea in a submersible.

The corvette is responsible for maritime security duties.

A destroyer is a warship designed to pursue enemy submarines.

The escort ship has entered the port.

This battleship played an active role in World War II.

The capital ship protected us from the enemy's attack.

Landing ships are used to transport soldiers to the enemy's coast.