Thanks, Carlos, for the positive feedback - much appreciated. Regarding
your query, can I refer you to 3.n in the writeup which states:-
n. An empty ship, though it remains on the gameboard, presents no
hindrance to any movement of ships or crew across the cell it occupies,
behaving just like a completely empty cell in this respect, until it is
once again crewed.
Hope this covers everything. All the best, Dave J.