They are all called cargo ships.
If they carry a special kind of cargo, then they are sub-categorized into
Oil:
VLCC = Very Large Crude Carrier
ULCC = Ultra Large Crude Carrier
Transporters/Ferries:
RO-RO = Roll On, Roll Off
Other categories:
Bulk Carriers
Container ships
Oil Tankers
Gas Tankers
Car Carrier
a Fleet
It is called an "Armada"...
A fleet. An armada A+
a novel fleet
a number of ships is called a fleet.
A fleet of ships is a bunch of ships together to make a aconimy
The Spanish Armada.
The first fleet of ships that landed in Australia was simply called the First Fleet.
That would be either a fleet, such as acommercial fishing fleet, or an armada, such as a naval armada.It can also be a Squadron, for military ships.A group of ships can be a flotilla, a squadron, a fleet, or an armada.
A smaller number of ships is a squadron. A number of squadrons make up a fleet. A large number embarked on the same mission may be called an armada.During World War II, elements of the Pacific Fleet were assigned to any of several groups called a "task force", within a larger naval operation.
a fleet
Fleet