An active boat which is used in this way is
not “consumed”. It can therefore still be
used by all players.
The individual additional actions of the boats
are described in detail on the next page.
At the end of the round, the active boats
are cleared from the berths and put into
discard piles. If the stack of one color of boats
becomes empty, the cleared boats of that color
are shuffled and placed face down as a new stack.