What was puzzling to me at first was that the Happy River is a Heavy Lift vessel with two cranes built in.
http://giantmarine.fr/images/referen...e/heavy_05.jpg
Your initial photographs showed a mobile truck-mounted crane being used - my question was why? (when the ship has its own lifting facilities).
Now it seems that the mobile was just for the blades and the Happy River will probably use its own cranes to unship the towers . . .
Whilst the mobile crane was rated at 100 tonnes, this is at a restricted (small) radius. A much stronger crane is needed to be able to lift 100 tonnes at maybe 30 metres or more.
(I'm sure that
hilifta - and others on here - will know this of course.)