Coba jelasin Pengiraan tanan dari Tanan dalam bahasa melayu dong

The Oxford Companion To Ships & The Sea, by I. C. B. Dear and Peter Kemp.  Oxford University Press, 1979.  ISBN 0-19-860616-8

Ship Design and Construction, Volume II; Thomas Lamb, Editor.  Society of Naval Architects and Marine Engineers, 2004.  ISBN 99909-0-620-3