Contract Award

Zeevonk Cable Packages Need a Common Length Schedule

Published 1 November 2026 Publisher IMWO Region Europe Confidence Confirmed
Illustrative Zeevonk turbine connections emphasise the cable route, end protection, termination and testing as separate completion tasks.

IMWO original engineering diagram; source: Boskalis

Zeevonk's owner announced 162 km of cable supply in May; Boskalis's October installation award covers about 149 km. The delivery team needs a common route, cable-end and test schedule across those packages.

Supply and installation announcements use different lengths

Boskalis's 1 October award covers about 149 km of 66 kV inter-array cable for 69 turbines, with testing, termination, protection, survey and seabed intervention. BOKA Ocean is planned for transport from Eemshaven and offshore installation [1]. Vattenfall's 11 May TKF supply award describes about 162 km, including design, manufacture, testing, delivery and accessories [2]. The published figures need reconciliation against a common cable schedule before they are used for quantity or progress comparisons.

Close each route and both cable ends

The manufacturing and installation schedules need the same section identifiers, route revisions and end allowances. The 13 km difference between the rounded announcements is a question for that schedule; its cause remains to be resolved in the package records. For production control, pair each installed section with its delivered cable length, both end conditions, protection and test status. Kilometres laid can otherwise grow while terminations accumulate behind the vessel. Acceptance of manufactured cable and of installed circuits needs a defined test handover, so that damage or a failed test can be traced to the relevant stage and cable section.

Evidence conclusion

Coordinate the 2028 workfront before reserving crews

DEME's foundation award includes 69 monopiles, marshalling and a scour-protection filter layer [3]. Vattenfall's 14 October turbine-installation announcement adds Norse Energi, with preparation expected in 2028, completion envisaged in 2029 and the project still subject to final investment decision [4]. The foundation, cable and turbine programmes should identify when each structure is ready for pulling-in, protection and termination access. The resulting sequence determines which teams can work in parallel and which require an exclusive workfront. A resource plan built from those releases can expose a vessel waiting for a cable landing or a termination team waiting for structural access before offshore commitments are made.

Outstanding evidence

  • Reconciled supplier and installer cable-length schedule
  • Section-level protection, termination and test handovers
  • FID and the actual 2028 structure-release and vessel sequence

Related records 1

Subject index

Related subjects

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Sources used 4

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