Marine navigation

Houghton Mifflin. 1997. ISBN 0-85177-739-2.  May, William Edward. A History of Marine Navigation. Henley: Foulis. 1973. ISBN 0-85429-143 请检查|isbn=值 (帮助). 

J. Marine Electronic Navigation (2nd Edition). Routledge & Kegan Paul. 1988: 68-69. ISBN 0-7102-1271-2.  引文使用过时参数coauthors (帮助) List of navigation aids

9001品質管理證書。同月，海事處處長根據國際航標協會（英语：International Association of Marine Aids to Navigation and Lighthouse Authorities）所發出的船隻航行監察服務人員訓練機構認證指引，代表主管當局向海事處訓練中心頒發認證證書。

Edward A.; McEwen, William A. Ch. 18:United States Navigation Laws and Ship's Business. Merchant Marine Officers' Handbook. Centreville, MD: Cornell Maritime

almucantar. Merriam-Webster Dictionary.  May, William Edward, A History of Marine Navigation, G. T. Foulis & Co. Ltd., Henley-on-Thames, Oxfordshire, 1973, ISBN 0-85429-143-1