On the other hand, with a larger distance between moorings,
the placement becomes cheaper as fewer cables
have to be connected to the ocean floor.
In addition, the cables themselves are thicker, but in decreased
amount still less expensive than more, thinner
cables. In total the costs have an optimum for a distance
of about 4 km between moorings (bottom of top line in
the graph), and hence this distance has been used to dimension
the tension cable (see sub-chapter 3.6), and the
mooring equipment.