Student or Learner
Are both form correct:
tons or tonnes
transhipment or transshipment?
If so are there any preferences for usage more often particular form or that is the British/American case?
ton = imperial measurement
tonne refers to a metric ton (1000kg).
Ton is also used to refer to a unit of volume or a unit of energy.
It is also slang and can be used as so;
"I have a ton of work to do"
"That's a ton of money"