Magilum

Magilums (Ships of the death) were funeral boats used in ancient Sumer. İt is depicted as, " The last journey one must undertake" to the land of the death. As the sumerian pantheon was mostly based on an agricultural belief system, water was used as a passage to different planes and the gateway to the afterlife. İn the Gilgamesh Myth it was the funeral boat.
See more at Wikipedia.org...

[Mesopotamian] The boat of the dead in Mesopotamian mythology.