Categories N & J have separate beds, where one bed can be turned into a sofa. Category A has upper and lower berths, most with portholes. Limited/no view. All rooms have showers.
Category I cabins have an upper berth and lower bed that can be turned into a sofa, plus a shower. Category D cabins may be inside our outside cabins and feature upper and lower berths. This category only has a washbasin.