Bigger and better (??):
Seems like lots of folks looking for ways around the Jones Act since they purposely highlight this. Repurposing unneeded UDWs seems like a good idea. UDWs got totally overbuilt. Let’s hope WTIVs don’t go the same route given their large price tag.
There are different type of WTIVs for different tasks . The one shown only install monopiles and transition pieces. (Or transport same)
To install the towers, nacelle and blades takes a different type of WTIVs (Usually of the jackup type)
The article was about just that; converting UDWs to use in the OWF industry.
Possibly, but it doesn’t get around the JA since none of them are built in the US.
So long as the installer stays on site and doesn’t visit US port it would be compliant. The transporter would be compliant so long as it loaded in a non-US port. What Does The Jones Act Mean For Offshore Wind?
Yes that is how it has been done with the few Offshore Wind Turbines that has been installed offshore US.
But it is expensive and also more risky than to load the component on the WTIVs in the nearest port.
Transferring components from a Transport vessel to a WTIV at sea is an unnecessary additional risk and expense.
UDW drill ships can be converted to install foundations and monopiles, but not so easy to install legs and jacking system on one.
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Yep, I totally agree with the expense and adding risk. Jones Act has always meant added expense. I am heavily invested in OSG and American Shipping Company and have a fairly good grasp on the various aspects of the Jones Act petroleum markets and how they interact with their international counterparts. The proposed investments in US offshore wind are too large for me to ignore as an investor, so I am learning all I can about this growing market. Dominion’s CHARYBDIS will obvious not be adequate to meet demand so there will have to be other workarounds to the Jones Act until an adequate supply of Jones Act-compliant WTIVs are available. Of course there is the risk of overbuilding the market like what happened with UDWs. I have read a lot of the other stuff you have posted on offshore wind, so thank you! Is has been helpful 
When nobody wants drilling rigs Sembcorp just find something else to build:
Maersk Supply join in the OWF installation business with an aim on the US market.
The first venture will be a new WTIV to be built by Sembcorp in Singapore:
Combined installation vessel for foundations, transition pieces AND turbines;
With bigger and heavier wind turbines comes the need for a new and simple crane design to do both offshore installation on bottom supported and inshore installation of floating wind mills.
The Dutch to the rescue:
New tool for foundation installation vessels:
Here is the max. dimension of piles that can be handled:
The Motion Compensation Pile Gripper will enable Heerema to install monopiles up to 12.5 m in diameter, with a length of up to 115 m and a weight of 3,200 metric tons.
New FIV design under construction for Cadeler has secured more work 3 years before delivery:
The illustration shows the PIV only. Here is the proposed WTIV-Light:
Bleutec’s “WTIV-Light” turbine installation vessel (NETSCo / Bleutec)
And finally, Bleutec’s SOV concept:
Photo courtesy Bluetech Industries via gcaptain newsletters.
That completes Bleutec’s innovative Binary Marine Installation Solution (BMIS).
Another FIV design being developed for a growing world market:
Looks suspiciously like a X-Bow?
Well, it is an Ulstein concept design:
Based on this one of these Ulstein designs, modified to Zero-C’s requirement:
