The boat from India was a crowded place; all long sea voyages on boats feel crowded. When you are stuck at sea for weeks there is nowhere to escape from people.

She watched the gap between ship and shore grow to a huge gulf. Perhaps this was a little like dying, the departed no longer visible to the others, yet both still existed, only in different worlds.

It was like working on a cruise ship.

I am [in your world].’ said Aslan. ‘But there I have another name. You must learn to know me by that name. This was the very reason why you were brought to Narnia, that by knowing me here for a little, you may know me better there.

She found out that having something to do prevented you from feeling seasick, and that even a job like scrubbing a deck could be satisfying, if it was done in a seamanlike way. She was very taken with this notion, and later on she folded the blankets on her bunk in a seamanlike way, and put her possessions in the closet in a seamanlike way, and used 'stow' instead of 'tidy' for the process of doing so. After two days at sea, Lyra decided that this was the life for her.

Cruise passengers can be blinded to the very real perils of the sea by ship operators unwilling to interrupt the party for security warnings. And after an incident occurs, a thorough investigation can be profoundly difficult when the crime scene literally floats away, on schedule, to its next port of call.