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It is called the radius. The full distance is called the diameter.
that distance is called the perimeter of the figure.
It is called speed Speed = Distance/Time
The longest distance in a circle is its diameter.
Echogram
It's called "draft". Draft is the distance from the waterline to the bottom of the ship.
The best tool to use to measure distance underwater is
An underwater bubble blower.
major methods used to determine distance and data recording in land survey?
a field recording
An underwater bomb is called a 'depth charge.
A turbidity current
sampling
Torpedo...
its called alge
diver