Category: Swing Moorings
Location: Studland Bay, Dorset, UK
Type of Project: Conservation
Products Used: Hazelett Conservation Elastics
Details of Installation: Eco-moorings using helical screw anchors and elastic rodes to eliminate seabed scour and anchor damage.
Challenges Overcome: Environmental constraints, protected habitat requirements, and the need to maintain boating access without damaging seagrass.
Collaborators: Boatfolk

The Studland Bay project is a strong technical example of how mooring engineering can be used as a conservation tool rather than simply as a vessel restraint system. Public information from the Marine Management Organisation shows that Studland Bay Marine Conservation Zone was designated on 31 May 2019 to protect seagrass beds, intertidal coarse sediment, subtidal sand, and the long-snouted seahorse. MMO concluded that anchoring pressure in the bay was not compatible with recovering the protected seagrass habitat, which led to a phased voluntary no anchor zone beginning in December 2021 and expanding in 2022. In that context, the Studland Bay installation was not just about adding mooring points. It was about replacing seabed-disturbing anchoring behaviour with a system that could keep boats secure while materially reducing physical damage to the seabed.

That technical response is now well documented across public project sources. Boatfolk, the Dorset Coast Forum, and the Studland Bay Marine Partnership all describe the eco-moorings as a helical screw anchor driven into the seabed and connected to the buoy by an elastic rode. Instead of lying on the bottom and sweeping through the seagrass like a conventional chain or repeatedly cutting the seabed with dropped anchors, the elastic element stretches at higher tide and contracts at lower tide so the rode stays off the bed and avoids scour. For a site where the environmental constraint was as important as the mooring load path, that detail is the project. The design had to preserve holding capacity and user practicality while eliminating the mechanism that causes most of the habitat damage.

The Studland Bay project also shows why a seagrass-friendly mooring system still needs a clearly defined operating envelope. Public operational guidance for the site states that users must not moor vessels over 10 tonnes, rafting is not allowed, mooring is not permitted when swell exceeds 1 metre, and stays are limited. The partnership also now identifies both 10-tonne and 5-tonne pickup lines in the field. Those details matter because they demonstrate that conservation moorings are engineered systems with use limits, inspection cycles, and management protocols, not just softer versions of conventional moorings. During winter, 10 eco-moorings remain in place while the rest are removed, cleaned, inspected, and stored before reinstallation for the season. That maintenance regime reinforces the technical goal of long-term habitat protection with controlled lifecycle management.

Boatfolk’s role in the first phase is important because it connects the project to real-world deployment rather than concept-level conservation planning. The Studland Bay Marine Partnership states that the initial 10 eco-moorings were supported and carried out on behalf of the partnership by boatfolk in 2021. Subsequent funding then supported an additional 57 eco-moorings, bringing the total available in the main boating season to 87. The Ocean Conservation Trust later added 22 marker buoys along the seaward edge of the voluntary no anchor zone, helping define and protect around 100 hectares of seagrass. Taken together, the project moved from a pilot installation to a managed field-scale mooring network with access control, navigation support, and seasonal operations.

The monitoring results are what make Studland Bay particularly compelling as a technical project page. The University of Southampton reported wave and tide monitoring using pressure transducers together with repeated scientific dives to assess whether eco-moorings were preventing further damage and supporting seabed recovery. Public annual reporting for 2025 states that anchor-scar area in monitored sites reduced from 2,308 square metres to 1,197 square metres between 2024 and 2025, with new seagrass shoots infilling previously bare areas. The same report says 73 percent of boats chose eco-moorings during summer 2025, overall compliance with the no-anchor approach averaged 88.4 percent, and only 8 percent of boats were non-compliant. For Hazelett, that is the deeper engineering story behind Studland Bay: an elastic mooring system working within tight environmental constraints, measurable user controls, and a monitored recovery programme that links mooring design to habitat outcome.

• The Marine Management Organisation says Studland Bay Marine Conservation Zone was designated on 31 May 2019 and covers 6 nautical miles of coastline.
• The protected features include seagrass beds, intertidal coarse sediment, subtidal sand, and the long-snouted seahorse.
• MMO introduced Phase 1 of the voluntary no anchor zone on 17 December 2021 and expanded the approach from 1 June 2022.
• Boatfolk and the Studland Bay Marine Partnership say the initial 10 eco-moorings were installed in 2021.
• The Fisheries and Seafood Scheme later funded 57 additional eco-moorings, bringing the main-season total to 87.
• Boatfolk says 10 of those eco-moorings remain available 365 days a year while the others are removed and reinstalled seasonally.
• The Ocean Conservation Trust says 22 yellow marker buoys were installed in 2024 along the seaward perimeter of the voluntary no anchor zone, helping protect around 100 hectares of seagrass.

• Public project sources describe each eco-mooring as a helical screw anchor installed into the seabed and connected to the buoy by an elastic rode.
• The elastic rode stretches at higher tide and contracts at lower tide so the mooring stays clear of the seagrass and avoids scour.
• Current user guidance for Studland Bay says vessels over 10 tonnes must not use the moorings, rafting is not permitted, and moorings should not be used when swell exceeds 1 metre.
• The Studland Bay Marine Partnership currently identifies pickup lines by capacity class, with yellow stickers for 10-tonne moorings and blue stickers for 5-tonne moorings.
• The University of Southampton reported using pressure transducers to measure tides and waves while monitoring whether eco-moorings prevent further seabed damage and support recovery.
• The Studland Bay Marine Partnership’s 2025 annual report says anchor-scar area in monitored sites reduced from 2,308 square metres to 1,197 square metres between 2024 and 2025.
• That same annual report says 73 percent of boats used eco-moorings in summer 2025, average compliance reached 88.4 percent, and non-compliance fell to 8 percent.

The Studland Bay project shows that in conservation-led mooring work, the main engineering challenge is often not maximum berth count or urban installation speed but how to control the interaction between the mooring system and the seabed. In this case, the public record supports a clear technical success story: conventional anchoring and seabed-scouring systems were replaced with helical-anchor, elastic-rode eco-moorings that preserve boating access while removing the primary mechanism of damage to sensitive seagrass habitat.

For Hazelett, Studland Bay Project is a strong technical proof point because it connects product benefits to a practical marina outcome. The system avoided piles, tightened dock positioning, improved year-round performance, and addressed the instability that often comes with conventional chain restraint. That makes the project a persuasive example of how elastic mooring can lower wear, reduce lifecycle cost, and solve deep-water marina challenges with a cleaner and more controlled floating infrastructure design.