In the in-game book called "No-h's Picture Book of Wood", it states that the last page of the book has the words "Boat Ack" scrawled about the margin in a vandalistic manner. This is a reference to the late Kurt Cobain, as in his teen years he enraged a neighbor by vandalizing a boat by painting the words "Boat Ack" on the side of it. The in-game book itself is rare and is found in only two locations, with one of them being on a boat called "Falvillo's Endeavor", which is docked near Vos.