Warship
Ocean Vessel
noun
A warship ship is a warship.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
いったいまたどうして艦船に住むことになったんですか？月々のお家賃はいくらぐらいですか。
How did you end up living in a warship? How much is the rent for this every month?