Lloyd’s Register Issue Rules for Stern-First Ice-Class Vessels

Press Release
Thursday, April 19, 2012

The first dedicated set of rules for stern-first ice-class ships has just been published by Lloyd’s Register, answering demands for technical support, as industry continues to explore the potential of polar transportation routes and the new energy reserves in the far north.

The timely release of the rules comes as more and more ships are being ordered with options such as podded propulsion systems and azimuthing thrusters – products which can improve icebreaking capability and reduce resistance - allowing them to navigate stern-first through ice.

"These practical rules are answering a growing demand in the market and include the use of standard operational scenarios to provide designers with a basis for prescriptive rule applications which have been validated with designers and operators of these specialist ships," said Robert Tustin, Lloyd's Register's Technical Manager for New Construction in Asia.

Lloyd’s Register has had a long involvement in the development of this class of ships. Mastera and Tempera – two 106,000 dwt "double-acting" tankers owned by Neste -- were built to its class in 2002 and 2003 at Sumitomo's yard in Japan. The ships were deployed to the Baltic, where they often operate stern-first in heavy ice conditions, independent from icebreakers.

Other tankers, such as Sovcomflot’s Mikhael Ulyanov and Kiril Lavrov, were designed and built for operating stern first in ice in the Arctic. These ships, dual classed by Lloyd's Register and the Russian Maritime Register of Shipping, were designed to eventually shuttle crude from the Prirazlomnoye platform in the Pechora Sea to a floating storage and offloading unit moored off Murmansk.

The development of Lloyd's Register's new rules were supported and validated by leading ice-class tanker designers, key regulators and operators.

The interpretation of regulatory and other rule requirements - and validation of strength levels for the hull and propulsion units - were confirmed by a review of the current fleet of double-acting ships, ensuring that practical experience supported the rules' development.

They offer the following key interpretations: The ship is considered as a bow-first and stern-first vessel for application of ice-class rule requirements for hull and machinery. It is also considered a stern-first ship for the application of navigation-related rules and regulations. In other cases, the rule applies to bow-first ships only.
 

Maritime Reporter March 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

People & Company News

Russia Ships First Oil From Offshore Arctic Platform

President Vladimir Putin hailed Russia's first shipment of Arctic offshore oil on Friday, saying the platform decried by environmentalists will help Moscow expand its global energy markets share.

Shipping Turns From Banks to Equity Markets for Cash

Shipping companies are turning to equity markets to fill a growing funding gap, betting that investors hungry for decent returns will provide capital to a sector

Keel-Laid for Navy's 10th LCS at Austal Yard

The Navy and Austal USA held a keel-laying ceremony for the future 'USS Gabrielle Giffords', the Navy's 10th littoral combat ship (LCS), in Mobile, Ala., informs

News

Crewman Claims Ferry Captain "Rushed Back To Bridge"

The captain of a South Korean ferry that capsized two days ago rushed back to the bridge after it started listing severely and tried in vain to right the vessel,

Canaveral Tops State List for Sand Bypass Funding

The Canaveral Harbor Inlet Sand Bypass Project has earned the top state ranking for 2014/15 inlet management funding. As a result, Port Canaveral is expected to receive $100,

Rotterdam port's throughput almost stable

The Port of Rotterdam’s throughput in the first quarter of 2014, at 109 million tonnes, was 0.2% below the level for the corresponding period last year.Split up by goods type,

Arctic Operations

Russia Ships First Oil From Offshore Arctic Platform

President Vladimir Putin hailed Russia's first shipment of Arctic offshore oil on Friday, saying the platform decried by environmentalists will help Moscow expand its global energy markets share.

Deal to Build Russian 60MW Icebreakers Imminent

The state nuclear power company Rosatom is about to reach a deal with United Shipbuidling Corporation on the construction of two powerful LK-60 icebreakers according to Barents Observer.

Canada Opts Out of Arctic Council Meeting

Canadian Environment Minister Leona Aglukkaq stated that a principled stand had been taken by Ottawa against Moscow's intervention in events in Ukraine, reports

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Standards Naval Architecture Navigation Pod Propulsion Port Authority Ship Repair Ship Simulators Winch
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1833 sec (5 req/sec)