Journal is indexed in following databases:

2022 Journal Impact Factor - 0.6
2022 CiteScore - 1.7




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




Associate Editor
Prof. Tomasz Neumann

Published by
TransNav, Faculty of Navigation
Gdynia Maritime University
3, John Paul II Avenue
81-345 Gdynia, POLAND
Emergency Unberthing without Tug Assistance
1 Tokyo University of Marine Science and Technology, Tokyo, Japan
ABSTRACT: Shipmasters may have to perform unberthing without tugboat assistance when a tsunami warning is issued. Keeping this in mind, we studied emergency unberthing without tug assistance by conducting numerical simulations and full-mission ship maneuvering simulator (SMS) experiments. A panamax class medium-sized bulker and a pure car carrier (PCC) were used as test ships. In the experiments, we established the limitations of basic shiphandling techniques such as stern kick out, backing, and accelerating turn in windy conditions using a mathematical modeling group (MMG)-type mathematical maneuvering model. On the basis of the results, we produced a shiphandling scenario and evaluated it using SMS experiments. We concluded that unberthing without tug assistance in 5 m/s onshore winds is possible. Furthermore, the use of thrusters can greatly reduce the time required for unberthing.
Kijima, K., Katsuno, T., Nakiri, Y., & Furukawa, Y. 1990. On the manoeuvering performance of a ship with the parameter of loading condition, Journal of the Society of Naval Architects of Japan, 168, 141-148.
Motora, S. 1959. On the Measurement of Add Mass and Added Moment of Inertia for Ship Motions Part 3, Journal of the Society of Naval Architects of Japan, 106, 63-68.
Hirano, M., Takai, T., & Matsumoto, N. 1981. Application of maneuvering model to shipbuilding design, The 3rd Marine Dynamics Symposium Text, The Society of Naval Architects of Japan, 101-136.
Yoshimura, Y., Ishigro, T., & Tanaka, S. 1995. Prediction of Full-scale Maneuverability in Early Design Stage, The 3rd Marine Dynamics Symposium Text, The Society of Naval Architects of Japan, 91-133.
Yoshimura, Y. & Nomoto, K. 1978. Modeling of Maneuvering Behavior of Ships with a Propeller Idling, Boosting and Reversing, Journal of the Society of Naval Architects of Japan, 144, 57-69.
Fujino, M., Sasuta, T., & Ida, T. 1978, Experimental Studies on the Effectiveness of the Side Thruster, Journal of the Kansai Society of Naval Architects, Japan, 168, 35-44.
Yamano, T. & Saito, Y. 1997. An Estimation Method of Wind Force Acting on Ships, Journal of Kansai Society of Naval Architects, Japan, 228, 91-100.
Citation note:
Kunieda Y., Yabuki H., Okazaki T.: Emergency Unberthing without Tug Assistance. TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation, Vol. 9, No. 3, doi:10.12716/1001.09.03.09, pp. 367-374, 2015

Other publications of authors:

Y. Kunieda, H. Kashima, H. Kido, K. Murai

File downloaded 2126 times

Important: cookie usage
The website uses certain cookies. A cookie is a text-only string of information that the TransNav.EU website transfers to the cookie file of the browser on your computer. Cookies allow the website to perform properly and remember your browsing history. Cookies also help a website to arrange content to match your preferred interests more quickly. Cookies alone cannot be used to identify you.
Akceptuję pliki cookies z tej strony