The ideal ship--for me--would be the Mariner with Voyager bathrooms! When we were in Alaska on the Mariner, the captain pointed out that he was able to maneuver the ship in the glaciers in ways that big ships could never do. It is able to go very close, for one, and he steers the boat back and forth so that people on both sides get a great view! We stayed outside see we could see AND hear the roar of the glacier. Fantastic!