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It is required that every military man travel abroad. And it is part of military training for every military man to be on board a ship.

You put the military on all private shipping vessel.

If you have local vessel leaving.. and 50 men on board it and 5 vessel a day. it is 250 men.

And when you do the multiplication. 250 X 365 days.. It comes to 91,250 military men that their passport will be stamp. It is required that every military man travel abroad. On foreign seaport, they stamp passport. It is important that every military man have its passport stamp once a year from this trips.

With ships, it allow all military to get stamp every year.