[Paul C. Jesup]

I believe that shipping tonnage refers to occuppied space and not weight. So there may not be as many explosives as you think.

Tonnage can mean many things, explosive power, actual weight or occuppied space.

[Lazamataz]

Tonnage can mean many things, explosive power, actual weight or occuppied space.

I measure weight in "Jerry Nadlers" now.

620 Metric Tons is approximately 1.2 Jerry Nadlers.