“…An example of the last type is Cavaliere: the site, at 43 m depth, was discovered by echo sounder, which registered a small hump on the flat, sandy bottom of Cavaliere bay. Excavatlon showed that a layer of sand, 50 cm thick, lay directly on the amphoras or ballast stones of the wreck (Charlin et al, 1978). At Chrdtienne C, too, encrustation was lacking, though here the upper part of the wreck appears to have been lost, owing to the action of helmet divers and fishing nets, before its discovery in 1954 (Fig.…”