In common people say a group of ships is called a fleet but it can also be written as flotilla instead of fleet. However, according to grammar both are collective nouns.
A fleet of ships.
A convoy.
A group of sheep is call
A flotilla.
may
you call them a fleet but if they are wardhips you call them armada
A group of sailors is a ships crew.
A Floatilla
An armada . Another answer: A group of ships together for protection is called a convoy. An armada is specific to armed war ships preparing to attack.
You have a FLEET of ships, SQUADRON of aircraft
A group of ships is called a fleet of ships.
what do you call a person that takes ships into and out of port