Originally Posted by Officer of Engineers

I've take it that you've never travelled 100 miles of water before. Your adrenaline maybe pumping in the 1st 15min to even half hour but it won't be pumping an hour into it and certainly not 5 hours into the trip (ie, your ships have to get out of port to organize themselves before embarking on the assault).

Either way, until your troops are put to sea in a training exercise, you won't know what percentage of your troops would be affected by sea sickness, drugs, or just plain confusion ... and it would be a poor commander who finds out during an actual operation.