Initially, 4,999 dwt Teknogas owned by Uni-Fleet, was en route from Haiphong, Vietnam, to Palembang, Indonesia, when it disappeared from radar.
On 10 June, the crew of Teknogas issued a distress
By Wendy Laursen 2015-06-12 00:02:19
The Western Australian government has taken action to help the shipping and boating industry protect Australia’s marine environment from invasive marine pests.
Fisheries Minister Ken Baston has launched a new risk assessment tool that enables operators to easily assess biofouling risk. It is designed for use before a vessel leaves its last port of call before reaching Australia.
“Vessels are the primary way marine pests are moved to new areas, and the shipping industry and resources sector, together with the Department of Fisheries, identified the need a couple of years ago for a standardized tool to help vessel managers reduce the risk of moving pests into Western Australia in biofouling,” Baston said.
Users of Vessel Check can test different scenarios for their vessel, so they can see how different management actions affect their vessel’s risk.
“Following a pilot trial, 30 submissions were received from industry consultants, inspectors, industry users, port authorities and government agencies, with feedback incorporated into the final version of Vessel Check,” Baston said.
The tool has also been validated against a range of real world vessels. “With Vessel Check, Western Australia is leading the way in managing the potential risks from biofouling that, unlike ballast water, is not regulated in a consistent manner around Australia.”
Over 250 marine species have been introduced into Australian waters by vessels of all types, from yachts to commercial ships. Of these, with up to 75 percent are likely to have arrived as biofouling attached to the external and internal surfaces of vessels.
With its large coastline and an average of 12 500 international vessel visits a year, Australia is highly exposed to the risk of invasive species from other regions being introduced into its coastal waters. Once established, marine pests are virtually impossible to eradicate.
By MarEx 2015-06-11 19:57:12
The International Association of Classifications Societies (IACS) has announced the adoption of new Unified Requirements to improve the safety of large container ships after an analysis of the MOL Comfort incident.
The 8,110 TEU vessel broke into two about 200 nautical miles (370 km; 230 mi) off the coast of Yemen in 2013. A fracture originated in the bottom of the shell plates of No.6 Cargo hold that eventually progressed up the side shell plating of the ship causing it to split in two.
The new rules will improve consistency between pre-existing class society provisions in this area. Amalgamated within a single new Unified Requirement (UR S11A) are three new safety measures that provide a robust, timely and complete response to the findings of the investigation by Japan’s Ministry of Land, Infrastructure, Transport and Tourism (MLIT) issued in March 2015 and subsequent papers to the IMO.
Introducing the new URs at the IMO, IACS Chairman, Philippe Donche-Gay, said, “Once again IACS has demonstrated its unrivalled technical capacity by delivering important Unified Requirements in a very tight timeframe that will further enhance large container ship safety. IACS is proud of its contribution to this important debate and stands ready to continue to assist the IMO in all areas where technical expertise can advance our common goal of safer and cleaner ships.”
UR S11A is further complemented by an additional Unified Requirement (UR S34) which deals with minimum loading conditions to be analyzed.
UR S11A is a longitudinal strength standard for container ships that explicitly addresses the three issues requested of both individual classification societies and IACS by the authors of the MLIT investigation report. In brief:
Bi-axial stresses which would be induced by lateral loading, i.e. external pressure on the bottom shell
IACS Members have for many years addressed these bi-axial stresses in their individual rules and procedures. The effect of the lateral loads which induce bi-axial stresses of bottom shell plates should be considered in the requirements of the hull girder ultimate strength and this will now be recognized in the new IACS Longitudinal Strength Standard for Container Ships, known as Unified Requirement S11A which will enter into force on July 1 2016.
The whipping effect on container ships
Although this phenomenon continues to be the subject of research, the effects are becoming better understood and some individual IACS members have developed specific rule requirements in this regard. The development of an IACS Unified Requirements for the whipping component of hull girder loading will take time, however in the interim IACS has introduced a functional requirement into the new Unified Requirement S11A which requires IACS Members to take into account whipping in accordance with their individual procedures. Entry into force is again July 1 2016.
A revised wave bending magnitude and longitudinal distribution has been included in the development of the new Unified Requirement S11A full details. This will be made available on the IACS website shortly.
Additionally, UR S34 will set consistent requirements among IACS members by defining the unified minimum load cases used while performing strength assessment of container ships by Finite Element (FE) analysis. This fulfills two principal aims. Firstly, by prescribing high-level functional requirements on loads, the bottom line of structural strength becomes unified and, secondly, by developing a minimum set of common loading conditions for Cargo Hold Analysis in the midship region, a baseline for structural strength at cargo hold in the midship region is achieved.
New S34 is applicable to container ships only and will apply from July 1, 2016 and requires a global (full ship) analysis for ships with length ≥ 290m and a cargo hold analysis for ships with length ≥ 150m.
In accordance with IACS commitment to safety and transparency these 50+ pages of new requirements are available on the IACS website along with the detailed technical background.