Generally it is known as the Beam.
the ships carrying emigrants were called "coffin" ships
The width.
Coffin ships were called coffin ships because lots of people died on them
Because they were ships? Do you mean longships? They were long and thin.
Diameter. Half of the width is called the radius.
A ships accountant is called a "PURSER"
Ships crew
a number of ships is called a fleet.
they were called Sailing Ships
Wooden sailing ships.
A Flotilla is a small fleet of ships
The width of a circle is called the diameter. The distance from the centre to the edge is called the radius and the distance around the rim is called the circumference