Source: https://tendernation.io/opportunities/01a13be8-867c-72bc-b6a8-8fc2d6408663/cm4-bathymetry-topographic-surveys-bishop-rock-and-longships-lighthouses closed GB open procedure # CM4 - Bathymetry & Topographic Surveys - Bishop Rock and Longships Lighthouses [Trinity House](https://tendernation.io/buyers/trinity-house) Estimated value £47,000 Published 26 Aug 2026 Deadline Closed 16 Sept 2026 ## Who can bid - Below-threshold contract Buyers cannot shortlist bidders on suitability before tenders are in, so everyone gets to submit a bid (except some larger works contracts). [Procurement Act 2023, section 85](https://www.legislation.gov.uk/ukpga/2023/54/section/85) - Open procedure Anyone can submit a full tender; there is no shortlisting stage. ## About this tender Trinity House (TH) holds the operation and maintenance responsibility for over 60 lighthouses around England, Wales, the Channel Islands and Gibraltar. These critical aids-to-navigation (AtoNs) include several Rock Tower lighthouses that require regular modernisation and ongoing maintenance. Accordingly, Trinity House would like to investigate the feasibility of utilising jack-up and floating assets to avoid repeated journeys to these remote locations by helicopter to mobilise personnel, equipment and tools. To support this investigation, it is important to have accurate bathymetric and topographic surveys of the surrounding area. ## CPV classification Topographical services Source Find a Tender (UK) · Notice ocds-h6vhtk-06ebc4-2026-08-26T09:51:49+01:00 [View official notice](https://www.find-tender.service.gov.uk/Notice/ocds-h6vhtk-06ebc4-2026-08-26T09:51:49+01:00) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. Free to start. [Track tenders free](https://tendernation.io/register) [Buyer profile Trinity House: past awards and live tenders](https://tendernation.io/buyers/trinity-house) [Sector More Architecture, engineering & surveying tenders](https://tendernation.io/sectors/architecture-engineering-surveying) ## More tenders like this [Architectural, construction, engineering and inspection services – Multi Operator Framework for Project Managers with Design/Technical Consultants for Educational Accommodation · Department of Education and Youth · 23 days left · 11 Nov 2026](https://tendernation.io/opportunities/01a156a9-cb77-70bf-a940-7366ca0959f7/ireland-architectural-construction-engineering-and-inspection-services-mul) [Construction project management services – Dietrich-Bonhoeffer-Gymnasium-Oberasbach – Neubau Mehrfachsporthalle · Landkreis Fürth · 28 days left · 16 Nov 2026](https://tendernation.io/opportunities/01a156a9-ce57-722f-92f9-e818a29a32bc/germany-construction-project-management-services-dietrich-bonhoeffer-gymnasi) [Engineering services – Mission de Maîtrise d'oeuvre complète pour la construction de 111 logements VAULX-EN-VELIN (69120) - ZAC MAS DU TAUREAU Îlots J1/J2 · Alliade Habitat · 28 days left · 16 Nov 2026](https://tendernation.io/opportunities/01a156a9-932d-7197-8cc1-ad619ede83e0/france-engineering-services-mission-de-maitrise-doeuvre-complete-pour-la-co) [Engineering studies – réalisation D'UN schéma directeur intercommunal d'assainissement · Charlieu-Belmont Communauté · 49 days left · 7 Dec 2026](https://tendernation.io/opportunities/01a156a9-9427-728b-9f2e-57d5081fa516/france-engineering-studies-realisation-dun-schema-directeur-intercommunal-d) [Architectural, construction, engineering and inspection services – Matthias-Claudius-Schule Tragwerk und Bauphysik · Stadt Kaarst - Der Bürgermeister · 36 days left · 24 Nov 2026](https://tendernation.io/opportunities/01a156a9-cc1c-708b-90a7-a22d2885c295/germany-architectural-construction-engineering-and-inspection-services-mat) [Engineering services – Sanierung der Festhalle Stöckwiese in Bietigheim, Freianlagenplanung · Gemeindeverwaltung Bietigheim · 28 days left · 16 Nov 2026](https://tendernation.io/opportunities/01a156a9-d828-701f-861f-726e9936bb48/germany-engineering-services-sanierung-der-festhalle-stockwiese-in-bietighei)