I Was watching Vancouver cruise ship videos on YouTube the other day that were taken recently and found this video below. I think it must be the one you are referring to as it really struck me when the horn goes off. Itβs out about the six minute mark in the video. It goes on for at least four or five minutes in the video before she ends it.
We got the same for a July 9 th. Sounds like all the Koningsdam Saturdays got a change, must be a port timing thing, leaving half an hour early sounds good to me π