The Roman Invasion of Britain: Landing

[jvrjenivs]

you have to go on land everyday for sure. These vessels were not big enough to house sleeping place and foot (and drinking water) for the whole crew for a long time, so they at least needed to beach regularly to get re-equiped. Also, to maintain a ship without modern stuff to protect the wood, it can't be left in the water all the time. It will absorb to much water, become rather heavy and sunk, also.