The Allege ("lighter") was generally a small cargo ship destined to partly unload large merchant ships docked or in river towns. They had the role of the current "feeders", mini-container ships whose utility is to transfer the loads of larger container ships, moored offshore, whose draft is incompatible with the port depths. This particular ship was known east of Arles, detached to Toulon. It was specific to this city, with a hull derived from Tartane, a single mast 15 m wide by 5 wide (3/1 ratio, typical or that lateen rigging), with a low draft and flat bottom, and destined to reach the Rhone. Arles stones and timber were two of the most common loads of these ships.