1.First define what u mean by "sit deep"
If u mean that the (volume submerged divided by the total volume of the body)
is greater,then it follows that the density of the plastic ship is greater.
2.As for the problem of floating in a tilted manner,that is independent of density except for c.b position change.C.B,C.G relative position must be considered.And if ur sure that two ships having proportional dimensions,shape,positions of c.g,c.b still show different angles of tilting,then scale factor must play some role...
