Boat trips are basically all trips on water (e.g. cruises, river cruises, sailing trips, yacht charters). The separately stated premium for ship voyages applies here.
The following journeys are excluded: "Blue Voyage" in Turkey and Nile cruises in tour operator catalogues, ferry passages and houseboats. In these cases, the premiums for plane journeys apply.
Combined trips must be insured as ship voyages if it accounts for more than 1/3 of the total trip duration (e.g. one week river cruise and one week hotel).
A bus tour includes trips with a bus/coach arrival and departure followed by a hotel stay or a coach tour at the destination.