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Heerema have mostly chosen to use their own ships for supporting their crane barges, when this might be required, and in line with that process the President Hubert has been working for them for years, although now pensioned off. Here it is laying anchors for the Hermod back in 2004 at Ekofisk. It was also used for bringing barges out to the location when things were being built out there, or if some other craft towed a barge out it might be connected up to the stern for it to be positioned for a lift.
I have many photos of operations taking place on ships and oil rigs, and here is one of the guys on the deck of the Maersk Server, a UT 722, dealing with the complexities of the Vryhof Stevmanta VLA anchor. The anchor was developed in order to provide a secure mooring in deep water where, essentially, the tension is vertical, rather than horizontal. Its operation requires the setting of a link at the point where the chains converge. This allows the anchor to be deployed at a fairly conventional angle and then when sufficient tension is applied the link is broken and the anchor takes up an angle at 90 degree to the mooring (Hope this is clear).
Here is the PX105 CBO Alianca brand new in early 2017 and built in Brazil. It was photographed in the Lula Field. It is one of at least two of the type owned by CBO, I find it interesting that there is a crane which has its own cab on the starboard rail. What will this crane be used for? Maybe it's intended that it should load its own cargo in port.