The Polar Environmental Centre n Centre for Environmental

The Polar Environmental Centre n Centre for Environmental Research and Cooperation in the Polar areas and the Barents Region

Nytek NS 9415 Application of the new Norwegian standard for certification of fishfarms. Reinhold Fieler Seniorconsultant & Chairman N. N. Fish Farmers Ass.

New technical standards - why? Challenge Damage and wreckage in floating fish farms in heavy weather Escaping fish, an issue of protection of wild stocks Security of the people Lost money for the farmer Goal: reduce escaping of fish and improved security

Solutions Floating farms must be proven to withstand forces under extreme conditions at their specific site. All farms in Norway must conform to a minimum standard. Norwegian standard 9415 (Nytek) – every farm must have a certificate at each site. Standard is developed by the authorities AND the fish farmers. Can neither cope with sabotage, collisions with ships nor with tsunamis.

The site – step I Forces induced by • • • wind tides bathymetry and topography give site specific currents and waves These work on the construction. Measure & calculate site specific forces! • currents (28 days pluss risk margins) • waves are modelled from winddata & topogr. = input data for further computations = classification of site.

Height of wave Current velocity a 0. 3 m/s b 0. 5 m/s c 1. 0 m/s d 1, 5 m/s e > 1, 5 m/s A 0. 5 Aa Ab Ac Ad Ae B 1. 0 Ba Bb Bc Bd Be C 2. 0 Ca Cb Cc Cd Ce D 3. 0 Da Db Dc Dd De E > 3. 0 Ea Eb Ec Ed Ee

Floating construction – step II Cope with the forces? • design of mooring system & positioning • strength of ropes, shackles, chains, etc. • PE-rings (steel or wood), nets Simulate forces in dynamic modell called Con. Motion®. Results in tension map in each point of the construction Controle if the design of the farm and the chosen equipent complies with the expected extreme forces.

Audit documentation – step III Collecting of specifications, descriptions & manuals for • equipment, • procedures, • maintainance. Review the documents • complete ? • correct ? • specs. comply to forces?

Inspection and deviations – step IV Visiting the farm and inspect equipment • • • is is is it what it claims in the papers? it in good shape? assemblage correct? Report deviations. Follow up correcting of deviations. Issue certificate.

Achievments improved the technical standards and quality of design and equipment minimum standard in ALL farms starts a process in the mind of more people reducing escapees

Thank you for your attention !