The Cooperative Research Navies (CRNAV) started in 1989 with the intention to investigate the dynamic stability of naval vessels. The main activities comprise the following areas:
- Prediction and validation of extreme motions for intact and damaged ships.
- Capsize risk assessment for intact and damaged frigates.
- Operational guidance and training.
- FREDYN software developments and deliverables.
Participating Navies have formed the Naval Ship Stability Working Group (NSSWG) to develop more rational based dynamic stability criteria than presently available. The Operator Guidance Training & Working Group (OGTWG) was formed to include operational information in capsize risk assessment studies and to further introduce heavy weather training on bridge simulators linked to FREDYN.
In principle the research is carried out by the member organizations only. The results of the investigations are the sole property of the CRNAV members. The strictest confidentiality is maintained and results may be published only after approval of the CRNAV. Each organization may decide to continue the cooperation or to withdraw at the conclusion of each three-year period. Overhead costs are kept to a minimum.The research program of CRNAV is broadly defined for three year periods (phases) and closely defined for each coming calendar year. The work includes Fundamental, Design, and Operations oriented projects. Fundamental work deals with the further development and validation of FREDYN for prediction of extreme motions for intact and damaged ships. Design orientated work focuses on capsize risk assessment of intact and damaged ships, while Operations oriented projects deal with operational guidance and training.The CRNAV group consists of the following members (2015-2017 period) with voting rights:
- Canadian Navy (DMSS, Ottawa)
- Ministry of Defence, DGA Hydrodynamics (Val de Reuil)
- Australian Navy; Defence Science Technology Group (Department of Defence, Melbourne)
- Royal Netherlands Navy (Department of Defence, The Hague)
- Royal UK Navy (UK MoD, Bristol)
- Maritime Research Institute Netherlands (MARIN, Wageningen)
The CRNAV group further consists of the following associated members (2015-2017 period):
- DRDC Atlantic, Halifax, Canada
- QinetiQ, Gosport, UK
In principle all organisations interested in the design and operation of naval ships may become member of the CRNAV. However, new members are accepted only by unanimous agreement of the existing members.