It is a captain. Some people spell it capton, but it's captain.Spell correctly and it will make life a little bit easier.
In the US Navy, and I suspect almost all navies, 'Captain' is a specific rank of officer, but whoever is in command of a ship may be addressed as 'Captain', even though his rank may be lower. In fact, the captain of a harbor tug may not even be an officer.
Additional Answer
In the Royal Navy, a ship's commanding officer is called the 'captain', but this does not necessarily indicate his rank. On a small ship, such as a minesweeper, the captain may be a lieutenant; on a nuclear submarine, the captain is normally a commander; on an aircraft carrier, the captain will usually be a captain.
On ships where the captain's rank is captain, the executive officer usually holds the rank of commander, and is referred to as 'the commander', rather than, for example, 'the XO'.
The commander of a ship is the Captain.
The commander of a ship is the Captain.
It is usually the Captain.
A navy commander would be piped aboard his ship. The ship's bell is only rung to announce the time.
On a real space ship, it is called the Commander's chair.
flagship
George Vancouver was a commander of his own ship known as HMS Discovery.
The commander of a vessel; Captain. The rank of "Commander" is called commander. A "Commander" in the US Navy is equal to a US Army LTC (Lieutenant Colonel-silver oak leaf). A USN Lieutenant Commander is a US Army Major.
He was the commander of the first ship to India, an explorer.
Neil Armstrong
The highest ranking officer on a cruise ship is called the "Ship Captain" or "Master of the Vessel." He is the only person on a ship who wears 5 stripes.
Roger Chillingsworth is following them for revenge and is boarding their ship to England.