---
title: "Nautilus Marine Survey"
ocid: "ocds-h6vhtk-02c64c"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-02c64c"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-02c64c.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-02c64c.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "NATIONAL GRID UK LIMITED"
published: "2024-05-02"
---

# Nautilus Marine Survey

Buyer: NATIONAL GRID UK LIMITED  
Current stage: Award  
OCID: ocds-h6vhtk-02c64c

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## Summary

The National Grid Interconnector Holdings Ltd and Elia Asset SA are developing proposals for a High Voltage Direct Current (HVDC) interconnector project named "Nautilus" between England and Belgium in the services category. The procurement process, which started with a cancelled tender, involves marine survey services to establish a preferred route alignment for the 200km HVDC interconnector installation. The tender is currently at the active stage and offers opportunities for businesses in marine survey services.

This tender by National Grid Interconnector Holdings Ltd and Elia Asset SA for the "Nautilus Marine Survey" presents opportunities for businesses in services related to marine geophysical and geotechnical surveys. The procurement process, which has a selective procurement method, is seeking suppliers for various lots including geophysical cable & platform, and geotechnical services for different periods. Interested parties are invited to register their interest and obtain pre-qualification documentation to participate in the tender process.

## Notice

Discontinuation of the procurement process for the following project: National Grid Interconnector Holdings Ltd and Elia Asset SA are currently developing proposals for a High Voltage Direct Current (HVDC) interconnector "Nautilus" between England and Belgium in support of ongoing programs for strengthening both the UK and Belgian Transmission Networks. The development process has identified the need for a HVDC Interconnector installation over a cumulative distance of approximately 200km. Survey requirements are thus arisen to establish suitability of a preferred route alignment.

### Lot Information

Lot 1A - Geophysical Cable & Platform and Geotechnical for Cable 2022

Marine geophysical survey including, but not limited to: * Survey design and planning * Multi-beam echo-sounder (MBES) survey * Side-scan sonar (SSS) survey * Sub-bottom-profiler (SBP) survey * Magnetometer (MAG) survey and in support of UXO avoidance prior to geotechnical works * General video inspection to map cable and pipeline crossing locations and inspect UXO incidents and possible benthic habitats * Geophysical Survey reporting and charting * Data delivery including GIS formats * Allocation of geotechnical location selection in collaboration with Employers * Final Integration of geophysics and geotechnics; reporting, charting and data delivery, including GIS formats Shallow marine geotechnical survey (investigation 3-10m below seabed), including but not limited to: * Marine geotechnical survey along the propose cable corridors including the intertidal, * Survey design and planning * Sediment sampling to a nominal up to 6 m below the seabed and preliminary offshore sediment description and basic testing * Proposal (in collaboration with Employers) and conducting of onshore geotechnical lab testing * PCPT survey to a nominal up to 5 m below the seabed and generation of preliminary offshore plots in general for the cable route * PCPT survey to a nominal up to 10 m below the seabed for crossing navigation routes, and generation of preliminary offshore plots * In-situ thermal conductivity measurements to a nominal up to 3 m below the seabed and generation of preliminary offshore plots * Geotechnical survey reporting and charting * Data delivery including GIS formats, * Input into the integration of results with the geophysics

Lot 1B - Geophysical Cable & Platform and Geotechnical for Cable 2023

Marine geophysical survey including, but not limited to: * Survey design and planning * Multi-beam echo-sounder (MBES) survey * Side-scan sonar (SSS) survey * Sub-bottom-profiler (SBP) survey * Magnetometer (MAG) survey and in support of pUXO avoidance prior to geotechnical works * General video inspection to map cable and pipeline crossing locations and inspect UXO incidents and possible benthic habitats * Geophysical Survey reporting and charting * Data delivery including GIS formats * Allocation of geotechnical location selection in collaboration with Employers * Final Integration of geophysics and geotechnics; reporting, charting and data delivery, including GIS formats Shallow marine geotechnical survey (investigation 3-10m below seabed), including but not limited to: * Marine geotechnical survey along the propose cable corridors including the intertidal, * Survey design and planning * Sediment sampling to a nominal up to 6 m below the seabed and preliminary offshore sediment description and basic testing * Proposal (in collaboration with Employers) and conducting of onshore geotechnical lab testing * PCPT survey to a nominal up to 5 m below the seabed and generation of preliminary offshore plots in general for the cable route * PCPT survey to a nominal up to 10 m below the seabed for crossing navigation routes, and generation of preliminary offshore plots * In-situ thermal conductivity measurements to a nominal up to 3 m below the seabed and generation of preliminary offshore plots * Geotechnical survey reporting and charting * Data delivery including GIS formats, * Input into the integration of results with the geophysics

Lot 2A - Geotechnical Platform 2022

Deep marine geotechnical survey (investigation 50-100m below seabed), including but not limited to: * Marine geotechnical survey for platforms * Survey design and planning * Continuous sediment sampling and preliminary offshore sediment description and basic testing * Proposal (in collaboration with Employers) and conducting of geotechnical onshore lab testing * PCPT survey to a nominal up to 100 m below the seabed * Additional down the hole testing as required * Geotechnical survey reporting and charting * Data delivery including GIS formats * Input into the integration of results with the geophysics

Lot 2B - Geotechnical Platform 2023

Deep marine geotechnical survey (investigation 50-100m below seabed), including but not limited to: * Marine geotechnical survey for platforms * Survey design and planning * Continuous sediment sampling and preliminary offshore sediment description and basic testing * Proposal (in collaboration with Employers) and conducting of geotechnical onshore lab testing * PCPT survey to a nominal up to 100 m below the seabed * Additional down the hole testing as required * Geotechnical survey reporting and charting * Data delivery including GIS formats * Input into the integration of results with the geophysics

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/014159-2024 |
| Notice type | Tender Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Selective |
| Procurement method details | Negotiated procedure with prior call for competition |
| Tender suitability | Not specified |
| Awardee scale | Not specified |
| All stages | Tender, Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 2 May 2024 |
| Submission deadline | 9 Aug 2021 |
| Future notice date | Not specified |
| Award date | 2 May 2024 |
| Contract period | Not specified |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Cancelled |
| Lots status | Active, Cancelled |
| Awards status | Unsuccessful |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | NATIONAL GRID UK LIMITED |
| Additional buyers | ELIA ASSET SA; NATIONAL GRID INTERCONNECTOR HOLDINGS LIMITED |
| Locality | LONDON |
| Post town | Central London |
| Postcode | WC2N 5EH |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI3 Inner London - West |
| ITL 3 | TLI35 Westminster and City of London |
| Local authority | Westminster |
| Electoral ward | St James's |
| Westminster constituency | Cities of London and Westminster |
| Delivery location | TLE Yorkshire and The Humber |

## CPV Codes

### Divisions

- 71 - Architectural, construction, engineering and inspection services

### Codes

- 71332000 - Geotechnical engineering services
- 71351200 - Geological and geophysical consultancy services
- 71351210 - Geophysical consultancy services
- 71354400 - Hydrographic services
- 71354500 - Marine survey services

## Release History

- 2 May 2024 at 09:07 - Award - Award Notice - https://www.find-tender.service.gov.uk/Notice/014159-2024
- 27 Jul 2021 at 17:14 - Tender - Tender Notice - https://www.find-tender.service.gov.uk/Notice/016090-2021
- 22 Jul 2021 at 13:25 - TenderUpdate - Tender Notice - https://www.find-tender.service.gov.uk/Notice/017362-2021

## Notice URLs

- http://www.ariba.com
- http://www.elia.be
- http://www.nationalgrid.com

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-02c64c. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-02c64c.json.