International Maritime Organization,5 Cambridge University Press,5 The Nautical Institute,4 Cambridge,4 IMO,3 Nautical Publishers,3 Butterworth Heinemann,3 Brown, son & ferguson,3 North Of England P&I Association,2 Press universitas,2 Fernhurst books,2 Thomas Reed Publications,2 Logman,2 The United Kingdom Hydrographic Office,2 WHO Press,2 Witherby Seamanship International,2 United Kingdom Hydrographic Office,2 Shipping Guides Ltd,2 TSO,2 Antony Rowe,2