Maritime Test Field Seefischmarkt
Summary – Key Advantages at a Glance:
- Representative salinity conditions due to freshwater inflow from the Schwentine – typical for many Baltic Sea regions
- Professionally equipped marina with electricity, water, and 400 V power outlets, as well as crane and slipway facilities
- Secure, designated 16 m² test area – sheltered yet centrally located
- 24/7 access for flexible, long-term testing schedules
- Optimal water depth of up to 5 m for demanding maritime applications
Infrastructure & Testing Opportunities
The test site is located in a sheltered area within the marina, yet remains embedded in an active maritime setting. Tests can be conducted on or below the water surface within a defined 16 m² section – ideal for both short-term and long-term experiments. The water depth reaches up to 5 m, providing excellent conditions for a wide range of maritime test setups. The area is clearly demarcated within the harbour, ensuring secure conditions for research and technical equipment, while offering direct access to key harbour infrastructure such as electricity, fresh water, and sanitary facilities. The site is accessible 24/7.
Current Tests in the Research Area
At the test site, four multi-purpose frames are currently being evaluated as part of the ULTFARMS project. The aim of these trials is to assess the technical feasibility and ecological functionality of different frame and suspension systems that could be used in multi-use offshore environments in the future.
Three of the frames are installed parallel to the water surface. These setups are used to test the stability, handling, and ease of installation of the structures. In addition, different rope and substrate types are being compared to determine their suitability for the cultivation of the green seaweed Ulva (Ulva sp.). The tests focus on factors such as initial attachment, growth performance, and substrate durability under realistic marine conditions.
The fourth frame is positioned vertically in the water and fitted with a specially developed growth substrate designed to serve multiple purposes. The trial aims to assess both the mechanical resilience and long-term functionality of the vertical frame structure, as well as the substrate’s potential for colonization by sessile marine organisms, such as mussels and barnacles. At the same time, the structure is intended to create shelter and refuge areas for juvenile fish and other marine species, thereby adding ecological value to the test area.
All trials are being closely monitored by underwater cameras. Three different suspension systems are being tested simultaneously, while the camera positions and settings are continuously adjusted to achieve the best possible image quality for growth and colonization monitoring. The collected visual data will play a key role in assessing the efficiency, durability, and environmental performance of the tested systems in subsequent project stages.
Location & Hydrophysical Conditions
The Marina
The marina “Seefischmarkt” is located directly at the mouth of the Schwentine River on the eastern shore of the Kiel Fjord. Originally an important hub for the local fishing industry, it has evolved into a vibrant center for maritime business, research, and leisure. In 2021 and 2022, the marina’s jetties underwent extensive renovation, with Pier B being converted into a floating pontoon. The harbour now offers 72 berths for vessels up to 25 m in length, each equipped with power and water connections – including 400 V outlets for larger boats. The entrance is well-lit and safe to navigate, while a 45 m floating breakwater provides reliable protection against swell. (seefischmarkt-kiel.de ostsee-charter-yacht.de).
Location & Hydrophysical Conditions
Situated in the inner Kiel Fjord, the area is characterized by its proximity to the Schwentine estuary. The freshwater inflow from the river results in a comparatively low salinity level, reflecting the reduced salt concentrations typical of large parts of the Baltic Sea. The site’s salinity conditions are therefore representative of broader Baltic Sea environments, making it particularly suitable for research and applications that require realistic brackish water scenarios.