During the feasibility study of a coastal survey vessel with a catamaran hull form for the Italian Navy, seakeeping behaviour was identified as a major concern. In order to reduce the risk of poor seakeeping qualities, two sets of seakeeping towing tank tests were carried out for two different hull forms (one with symmetrical hulls and one with asymmetrical hulls). The data obtained from the towing tank tests have also been used for the assessment of three different computer programs (two 2D strip theory and one 3D diffraction theory). The final results of the correlation study are presented; the 2D-twin program appears to be the most reliable and accurate tool for the predictions of the vertical motions of a symmetric catamaran. Its effectiveness for an asymmetric cambered geometry of the demi- hulls is less satisfactory, especially as regards pitch motions. The prediction of the roll motions requires further investigation. The 3D- twin program showed unexpectedly bad performances, mainly attributable to the preliminary nature of the release of the code for a true catamaran geometry.

  • Supplemental Notes:
    • Intl Symposium on High Speed Vessels for Transport and Defence; 23 & 24 Nov 1995; London, UK. Procs. Publ by RINA, London, UK. Ppr 3 [21 p, 26 ref, 6 tab, 28 fig]
  • Authors:
    • Boccalatte, C
    • Caprino, G
  • Publication Date: 1995


  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00728004
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Nov 4 1996 12:00AM