Argo Navis was a large southern
constellation representing the ship used by Jason and the Argonauts. It is the only one of
Ptolemy's list of 48 constellations which is no longer officially recognised as a constellation, having been broken up into
Carina (the keel of the ship),
Puppis (the poop),
Vela (the sails), and
Pyxis (the compass).