You do learn something new every day!
For the record Canberra, I didn’t say ‘cruise ships don’t go that far up the amazon’, I actually enquired ‘not sure a cruise liner can get that far inland’ which is a completely different proposition. Being an aviation forum, is it not possible that someone could look at the location of Manaus and not immediately be the first point you think of as a cruise embarkation and disembarkation point?