TenneT is seeking companies to carry out geotechnical and geophysical surveys at the locations of the BalWin 1, 2 and 3 platforms off Germany.
The soil investigations aim to obtain subsoil information in accordance with the BSH Standards at the three platform sites.
The contract would start on 27 October this year and run until 27 February 2022 and is not subject to renewal, according to the tender documents.
Interested parties have until 3.30pm local time on 12 July to apply.
TenneT is also looking for assembly insurance, including installation, construction work, transport and liability for the construction and commissioning of its BorWin5 offshore grid connection system in the German North Sea.
The tender is split into two lots, with both expected to run from 24 December 2021 to 19 February 2026.
Interested parties have until midday on 9 July to apply.