Overview of bergy bit impact trials

• Main Authors: Gagnon, R. E., Cumming, D., Ritch, R., Browne, R. P., Johnston, M., Frederking, R., McKenna, R. F., Ralph, F.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: 2002
• Subjects: Newfoundland
• Online Access: https://nrc-publications.canada.ca/eng/view/object/?id=8e2b3b3f-9e97-4214-a775-9f2b470140aa; https://nrc-publications.canada.ca/fra/voir/objet/?id=8e2b3b3f-9e97-4214-a775-9f2b470140aa

This paper presents and overview of bergy bit impact trials carried out on the CCGS Terry Fox off the northern tip of the island of Newfoundland in June 18-23, 2001. The trial consisted of impacting target iceberg ice masses ranging from roughly 30 t (growlers) to 22,000 t (bergy bits) on an instrumented bow area of the 'Terry Fox' at various forward speeds. Parameters measured included impact forces, pressure and contact areas, ship motions with six degrees of freedom, ship forward speed, and ambient environmental factors. In addition, extensive video and photographic records were compiled, including stereo photographs of the bergy bits. Furthermore, a multi-beam sonar was used to determine underwater profiles of some of the targeted ice massed. Temperature profiles were obtained for a number of bergy bits and some ice samples were collected from undamaged and impacted ice. This paper includes a description of the 'Terry Fox', instrumentation/set-up used, ice characterization and some sample results. NRC publication: Yes