December 9, 2005
"Green" containership makes Tacoma call
The Hatsu Sigma --the first of a new generation of Evergreen Group "green" ships-- made its first call at the Port of Tacoma today.
Port of Tacoma officials joined officials of Taiwan-based Evergreen Group and its U.K.-based Hatsu Marine Limited subsidiary to mark the arrival of the new S-type, 7,024-TEU mega ship.
Built by Mitsubishi Heavy Industries, the U.K.-flagged Hatsu Sigma is the second in a series of ten Evergreen Group S-type vessels designed with a host of environmental features designed to protect the oceans and harbors the ships call on throughout the world.
The S-class ships incorporate a double-skinned hull and all fuel tanks have been located within the transverse bulkhead spaces, minimizing the risk of oil pollution or fire as a result of grounding or collision.
A high capacity oily water separator enables the oil content of waste water to be reduced to just 15 ppm while much larger separator bilge oil and bilge oil holding tanks provide more storage capacity than normal, enabling the vessels to avoid any discharge when sailing in sensitive areas and to maximize the amount of waste that can be held for ultimate disposal in specialized shore facilities.
Similar arrangements have been made for handling sewage and gray water, including water from the cargo hold bilges, when the vessels are in port or close to shore.
The main engines and generators incorporate low NOx technology while the ships are also able to switch to low sulfur fuels when sailing in restricted areas such as the Baltic Sea.
'Cold-ironing', the ability to shut down all shipboard generators while in port, switching to shore-based electricity supplies, is also a feature of the S-class vessels. The Port of Los Angeles has already initiated an Alternative Maritime Power (AMP) program that require ships to shut down their diesel generators while in port but Evergreen expects many more ports to follow.
Evergreen reckons that the cost of meeting AMP requirements runs to about $2 million per vessel.
The latest tin-free anti-fouling systems are being used for the underwater hull coatings of the S-types and are being applied to other vessels in the Evergreen fleet when they undergo routine drydockings.
Evergreen has chosen to class those S-class vessels allocated to Hatsu with Lloyd's Register (LR) while those for operation by Evergreen Marine Corporation will be classed with the American Bureau of Shipping (ABS).
It will be applying to LR for EP (environment protection) notation and to ABS for the equivalent ES (environment safety) notation.
With an overall length of 300 m and a beam of 42.8 m, the S-class vessel are able to carry containers 17 rows across on deck and 15 rows across below deck. They have a deadweight of 78,200 tonnes on a service draft of 14.2 m.
Each vessel has a single 10-cylinder Mitsubishi Sulzer 10RTA96C main engine developing 74,700 bhp (54,900 kW) to provide for a service speed of 25.3 knots.
The carriage of temperature-controlled containers is made possible with the provision of 839 reefer plugs.