Sister Vessel:– A vessel that as a whole is identical in design to another vessel. The vessel is normally ordered by the same owner and is one of a series of vessels.
Similar Hull Structure:– A vessel that has the same lines, offsets, and hull scantlings to the vessel it is compared with, and has minor differences in machinery system, equipment, and accommodation. These changes from the original vessel reflect the requests of a different owner, the same owner, or the builder if not the same as the original builder
Comparable Hull Structure:– A vessel that has the same lines and offsets, with minor differences in hull scantlings, machinery system, equipment and accommodation. These changes from the original vessel reflect the requests of a different owner, the same owner, or the builder if not the same as the original builder.
