Worldwide there are approximately 3,000 merchant ports and the work of the Harbour Master can vary widely from country to country and from port to port even within the same country.
At the end of October Tokyo Kisen Co Ltd and e5 Lab Inc reported that they had jointly developed a new design concept of what is known as the e5 Tug. Designed to minimize its environmental footprint this electric propulsion harbour tug is powered by a large-capacity battery and a hydrogen fuel cell.
The e5 is equipped with a propulsion system running on what is known as the e5 powertrain platform, devised and planned by e5 Lab and which utilizes a large-capacity battery system as a main power source and a hydrogen fuel cell and generator as the auxiliary power source.
It is reported that this electric propulsion system will ensure sufficient bollard pull and continuous cruising time necessary for a harbour tug and which requires large-capacity power to function. Furthermore, CO2 emissions are minimized by incorporating the fuel cell.
This joint project is drawing upon knowledge and experience of Tokyo Kisen as a tug operator and e5 Lab is undertaking concept planning and development, design, and project management.
It is understood that Tokyo Kisen will proceed with the project by seeking advice from the Ministry of Land, Infrastructure, Transport and Tourism Japan, from ClassNK, and from others for regulatory compliance. It has been learnt that after the final investment decision Tokyo Kisen aims to launch the tug for commercial operations at Yokohama Port and Kawasaki Port in 2022.
In outline the e5 tug will be propelled by two1500kW azimuth thrusters, will have a towing power of 50 tons and a service speed of 14 knots.
As for its environmental performance the tug’s systems are expected to reduce CO2 emissions in all operational phases such as push / pull, transit and standby.
The tug may be able to offer value at the time of a disaster for it could function as a power supply from ship to shore. With regard to future advances the tug’s fully electrified powertrains can adapt to most suitable energy sources: lithium-ion battery, hydrogen fuel cell, all-solid-state battery, LNG generators and so forth as technology progresses and it will be possible to achieve zero emissions in combination with renewable energy.
About Tokyo Kisen
Tokyo Kisen Co Ltd with HQ in Yokohama is a major tug company in Japan with the mission of supporting maritime safety. Since its founding in 1947, the company has been consistently engaged in the operation of assisting navigational safety of ships throughout Tokyo Bay, the centre of Japanese marine transport, and one of the busiest sea traffic areas in the world.
Tokyo Kisen operates harbour and escort tugs, pilot boats and crew transfer vessels (CTVs) for offshore wind farms. In addition, its group companies operate water buses, harbour cruise ships and car ferries. In 2013, the company launched a (non-battery type) hybrid tug.
About e5 Lab Inc
e5 Lab Inc with HQ in Tokyo is a shipping systems provider based on the electrification and digitization of ships. With the mission of sustainable domestic shipping, the lifeline of Japan, e5Lab Inc aims to create new added value by combining the latest technology and ideas, and solving problems of domestic shipping, thereby ensuring safe navigation. Currently the company is proceeding with a project aimed at completing an electric propulsion Tanker EV Tanker of the Asahi Tanker Co Ltd. in 2021.
Five values provided by e5 Lab are: electrification, environment, efficiency, economics, evolution.
Relationship between recreational navigation and commercial or fishing ports is complex. Recreational vessels sometimes operate and berth in locations that are not ideal from the point of view of the integrated management of the coastal zone.
Interactions and conflict
Different uses and different interests on coastal segments can cause conflicts and risks that are difficult to manage. Sometimes a portion of an existing fishing, industrial or commercial port is converted to recreational boating use. This may happen as a result of specific intent within the context of a long-term port master plan, but sometimes is only a spontaneous response to the demand by recreational activities. Especially in the latter case, interactions between different kinds of traffic may lead to conflicts and may also cause unsafe and/or unsustainable situations.
Minimising potential conflict
The aim of this report is to identify best practice recommendations for the operation, planning and design of recreational navigation to minimise potential conflicts with other types of traffic and seek a new approach to positive synergies with fishing communities.
Here the intention is to generally assess the cause and effects of these conflicts, analyse data relative to accidents between recreational and commercial vessels, and to present case studies that illustrate some of the general trends, in order to reach useful conclusions.
The Smart Ports Summit, 19-20 February 2020, brings together the experts and innovators who are addressing the real…