Future Technological Developments in Deep-Sea Fishing

Senior Mechanical Engineer Pablo Parra Henríquez discusses the ongoing testing and development of Catch Protection Devices (CPDs) for deep-water tornado trolling and deep-sea longline fishing. The focus is on understanding hydrodynamic forces, improving containment solutions, and preventing loss of fishing gear at sea.

• Technological developments
• Deep-sea fishing
• Hydrodynamic forces
• Catch Protection Devices
• Fishing gear

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1. DIRECTIONS FOR FUTURE TECHNOLOGICAL DEVELOPMENTS -THE NEXT STEPS- Pablo Parra Henr quez | Senior Mechanical Engineer | AS FISKEVEGN COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016

2. Further testing and development of CPD concepts - CPDs Catch Protection Devices - FISKEVEGN is currently modelling hydrodynamic forces in deep-water tornado trolling and deep-sea longline fishing - With and without CPDs COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016

3. Further Further testing testing and and development development of of CPDs CPDs concepts concepts DEEPWATER TORNADO TROLLING Flume tank experiments COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016

4. Further Further testing testing and and development development of CPD of CPD concepts concepts FISKEVEGN pursues Catch Protection Devices based on knowledge obtained during these years to present a new solution that can be manageable at sea. Modelling and tank trials simulating deep-sea longline fishing are on- going Design iterations followed by field tests in deep-sea conditions are pending Volounteer vessel(s) will be needed for field trials COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016

5. Further Further testing testing and and development development of of the the CPD CPD concepts concepts - Proper understanding of forces from gravitation, accelerations and hydrodynamic processes is needed, with and without deployed containment solutions. Hydrodynamic estimated as two components; normal (N) and tangential (T) drag rope drag can be Zone determinaded by a rapid vertical, tangential drag ?+ ?? ? ??= ?? Zone determinaded by a rapid horizontal, normal drag Zone determinaded by gentle vertical, normal drag COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016

6. Further Further testing testing and and development development of of the the CPD concept CPD concept - Already loss of longline gear occurs frequently - Preventing additional loss of containers and lines will be an essential objective - Launch and recovery of any heavy overboard object at high sea is a challenge in its own right COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016

7. Operational Operational approaches approaches - We assume that orcas and other cetaceans are able to recognize the sound of longline operations. A simple conclusion; if we are able to reduce the noise, we will be reducing the distance of detection FISKEVEGN fishing gears are already relatively quiet. We now incorporate noise reduction criteria in the new generation of longline systems. This is already in the phase of engineering and prototypes. COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016

8. Operational Operational approaches approaches - If rapid hauling is going to be part of the operational strategy - development of longlines and mechanical equipment has to adapt to this. - Fiskevegns tests of new prototypes show that next-generation longline systems will have an over-capacity for rapid hauling and setting. - The main contraints instead lie in: - Health and safety issues for crew due to increased accident risks - Time and working conditions for proper handling of longlines and hooks - Increased risks for loss of gear, with catches on them - Incomplete understanding of the hydrodynamics of longline hauling - Development of longline gear that can keep up with increased physical strains - Increased loss of fish that is ripped off fast-moving or rapidly accelerating gears by inertia or hydrodynamic drag losses that need to be quantified COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016

9. THANK YOU COLTO Whale Depredation Workshop Punta Arenas, Chile, 16-18 March 2016