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The SPAR hull is then flooded with seawater and up-ended
(fig. 2.27, c). Once in place, the hull is connected to the already
installed mooring system. The topsides are then attached to the
SPAR hull (fig. 2.27, d).
a b
c d
Figure 2.27 – Building of SPAR
2.3 Tension-Leg Platform Drilling
In the class of compliant structures the tension leg (or
tethered) platforms are important developments as alternatives to
the fixed platforms that become extremely expensive for water
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