The symbolism of Queequeg's coffin changes as the novel progresses. Initially, the coffin represents Queequeg's apparently impending death and his nostalgic link to his home island. The coffin is shaped like a canoe because of the custom on Kokovoko of setting the corpse adrift in such a craft. The belief was that eventually it would float over the ocean to the sky, which connects to the sea, and ultimately to one of the islands (stars) in the sky. Queequeg saw similar canoe coffins in Nantucket, and the custom of setting the corpse adrift is widespread among sea-faring people around the world.
The coffin represents ongoing life when it becomes Queequeg's sea chest after he decides not to die. It represents hope for renewal and a practical means of saving life when it is rigged to serve as a life buoy. Finally, the coffin is a symbol of hope and even rebirth when it springs from the vortex of the sunken Pequod to provide Ishmael with a means of staying afloat until the Rachel rescues him.
