Sentence:  "I was only joking. We've escaped from a burning vessel, you know, and every one else is either burned or drowned. We've provisions for a month, if we don't eat too much, and we're in the South Sea Islands. South Sea Islands sound nice and <WSD>shipwrecky</WSD>, don't you think so?" 
Meaning of the word marked with <WSD> tags:  Characteristic of a shipwreck.