One ship tile looks just like another. As was explained above, you can either take all tiles off the board at the end of round A (for example), and replace all the tiles.
Or you can take off all
buildings,
special tiles,
animals,
and black-backed tiles
that are left after the five dice rolls of A, replacing them with newly drawn buildings, animals, special tiles, and black-backed tiles.
You can leave the ships, castles, and mines on the board because the replacements would look exactly the same as those you removed.
Or you can take off all
buildings,
special tiles,
animals,
and black-backed tiles
that are left after the five dice rolls of A, replacing them with newly drawn buildings, animals, special tiles, and black-backed tiles.
You can leave the ships, castles, and mines on the board because the replacements would look exactly the same as those you removed.