a) Giger's original concept for the Derelict ship roughly shares features with shapes from a French curve set perhaps with the out outer spine broken leaving the semi stump like parts.
|arm of Giger's derelict with elements of a french curve in its design|
|typical French curve set|
b) From the above view of the derelict ship, one might take the right side of the hammer tip on the end of the left arm as a starting point for an anti-clockwise spiral centre and before where the arm ends as a stump, the body extends in another direction twice conforming to the rough outwards spiral
|clockwise spiral around the main dome of the derelict ship|