The Egyptians, in fact, have a tradition that Hermes had thin arms and big elbows, that Typhon was red in complexion, Horus white, and Osiris dark,108 as if they had been in their nature but mortal men. Moreover, they give to Osiris the title of general, and the title of pilot to Canopus, from whom they say that the star derives its name;
also that the vessel which the Greeks call Argo, in form like the ship of Osiris, has been set among the constellations in his honour, and its course lies not far from that of Orion and the Dog-star; of these the Egyptians believe that one is sacred to Horus and the other to Isis.
The above quote is from [penelope.uchicago.edu] which seems to directly link Argo with the ship of Osiris. This is interesting as at the time of telling these stories Sneferu is deceased and the deceased Pharoah is associated with Osiris instead of Horus.
It also fits in nicely with a variable length hour per the civil calendar and doesn’t require an equinox. It makes me wonder if Sneferus story is to describe the part of the sky between the rising sun and the setting moon in Khufu/Djedi and in doing so avoids the issue of seeking a fish in the sky at the time of an equinox.
Need to resolve the issue of the nets and the rowers in this interpretation.