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ISSN 2083-6473
ISSN 2083-6481 (electronic version)
 

 

 

Editor-in-Chief

Associate Editor
Prof. Tomasz Neumann
 

Published by
TransNav, Faculty of Navigation
Gdynia Maritime University
3, John Paul II Avenue
81-345 Gdynia, POLAND
www http://www.transnav.eu
e-mail transnav@umg.edu.pl
Spring-loaded Winch Band Brakes as Tools to Improve Safety During Mooring Operations on Ships
ABSTRACT: Some recent accident reports involving large vessels in mooring operations or breaking away from their moorings conclude that brakes of mooring winches do not render before line parts. As the potential loss of life is high, the utmost attention on-board must be paid to minimise this inherent risk. When the load on the mooring lines becomes overloaded beyond the pre-set levels, mooring winches band brakes have the safety function of rendering and allowing the line to shed this load before its potential breaking and the subsequent snap-back. As a preventive measure against breaking, the pre-set level, known as Brake Holding Capacity (BHC), must be below the Minimum Breaking Load (MBL) of the line. In this paper, the authors analyse concerns that can arise from those with conventional screw manually-applied band brakes regarding their BHC reliability. Thus, in order to improve safety, the advantages of the spring-applied band brakes with manual setting and release or with hydraulic release are highlighted. Finally, the paper shows a typical procedure using a hydraulic jack for brake testing the winch of a Liquefied Natural Gas (LNG) ship to fix their BHC in order to hold 60% of the MBL of the mooring line.
REFERENCES
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DMAIB (2014a) Danish Maritime Accident Investigation Board: “Pachuca” Mooring accident report. https://dmaib.com/reports/?query=Pachuca
DMAIB (2014b). Danish Maritime Accident Investigation Board: “Torm Republican” Mooring accident report. https://dmaib.com/reports/?query= Torm+Republican
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ISO (2012). ISO 3730:2012 Shipbuilding and marine structures - Mooring winches.
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MAIB (2001). Marine Accident Investigation Branch report 1/2001: “Alfa Britannia” Mooring accident report. https://assets.publishing.service.gov.uk/media/547c7162e5274a428d00010d/alfa-britannia.pdf
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OCIMF (2018). Mooring Equipment Guidelines (MEG4) (4th edn). Witherby Publishing Group Ltd.
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Steamship Mutual (2015). Risk Alert: Mooring winch brake holding capacity. Steamship Mutual, London. https://www.steamshipmutual.com
UK P&I (2016). Risk Focus: Consolidated 2016. Moorings, pp. 17-26 and APPENDIX “Understanding mooring incidents”, pp. 27-34. https://www.ukpandi.com
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Citation note:
Iglesias-Baniela S., Pérez-Canosa J.M., Cid-Bacorelle D.: Spring-loaded Winch Band Brakes as Tools to Improve Safety During Mooring Operations on Ships. TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation, Vol. 14, No. 3, doi:10.12716/1001.14.03.25, pp. 711-719, 2020

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