Another comparison of directional wave measuring systems is scheduled to take 

 place during a sea trial in March 1987* A multinational effort will be carried out 

 under the auspices of Research Study Group (RSG)l, Full Scale Wave Measurements, 

 chaired by the U.S.A., under Special Group of Experts on Hydrodynamics (AC/2^3 

 (Hydro)). The Dutch research ship TYDEMAN and the Canadian research ship QUEST will 

 be used as launching platforms. This upcoming trial will bring together an 

 interesting variety of in-situ directional wave measurement systems, including 

 buoys and possibly shipboard radar. 



A comparison of SOWM forecasts and buoy measurements during the TYDEMAN trial 

 is the subject of a future publication. Also included will be comparisons of SOWM 

 forecasts and wave measurements conducted during other sea trials. 



ACKNOWLEDGMENTS 



The kind cooperation of the Royal Netherlands Navy, Exchange Agreement No. 

 MWDDEA N-65-TN-U803, allowed this sea trial to be carried out. Dr. ir. J.M. 

 Dirkzwager of the Ministry of Defence is gratefully acknowledged for his coor- 

 dination in arranging the trial. The Delft University team headed by Prof, 

 i.r. J. Gerritsma contributed greatly to the technical success of the trial. The 

 assistance of Messrs. M. Buitenhek and J. Ooms is greatly appreciated as is the 

 assistance of Mr. Gerritsen of Datawell. The officers and crew of the TYDEMAN, 

 under the able leadership of CAPT A.P.H.M. Lempers, are gratefully acknowledged, 

 for their assistance throughout the trial. The coordination of the American 

 efforts by Ms. S.L. Bales of DTNSRDC is greatly appreciated. 



The wave forecasts radioed by FNOC were quite helpful in planning the ship's 

 route and the efforts of LCDR Mass are particularly appreciated. The assistance by 

 Ms. C. Bennet and ENS's G. Hobson and A. Meurer of DTNSRDC has been very helpful. 



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