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 July 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

People & Company News

Major Ivorian Cocoa Buyers Boycott Local Exporters Scheme

Major cocoa buyers are boycotting a scheme in Ivory Coast aimed at guaranteeing local firms a share of the lucrative export market, arguing that these players lack

DSM Dyneema Names President’s Successor

Gerard de Reuver has elected to step down as President of DSM Dyneema on August 1, 2015 after five years in the post, the company announced today. He will be succeeded by Golnar Motahari Pour,

Matson Pumps $30 Million into Alaska Operations

Ocean cargo shipper Matson, Inc. said it is moving quickly to fund improvements in its new Alaska operations following its May 29 acquisition of Horizon Lines' Alaska services.

Education/Training

The Marine Engineering Handbook

MarEngine English Underway by Wieslawa Buczkowska is a marine engineering English handbook that can be used as a practice teaching tool or for self-studying.   The

Côte D’Ivoire Invests in O&G Safety Training

Thegrowth in oil and gas activity in Côte D’Ivoire has seen investment in standardized safety training in the region far outstrip that of other hydrocarbon-rich West African countries,

Ghana to Roll out Shipping Training

Ghana is considering establishing modalities to compel shipping companies to introduce a training regime which ensures that their local staff gain professional qualifications in shipping.

News

Two New Hybrid RTGs for Port of Shanghai

Corvus Energy informs it will provide the battery systems for an additional two hybrid solutions for new rubber-tired gantry cranes (RTGs) that will be produced

USCG Investigates Oil Slick off California Coast

The U.S. Coast Guard was investigating a large oil sheen off the California coast west of Santa Barbara on Wednesday, a spokeswoman for the agency said.   The slick,

Puget Sound Reports Container Volume Growth

Less congestion and efficient cargo movement helped international container volumes through the Puget Sound gateway improve 14 percent in June compared to June 2014, the port reported.

Arctic Operations

Arctic Range of Liferafts Introduced

Ship operators working in polar regions can now equip vessels with liferafts from the SurvitecZodiac range that have been manufactured to meet Arctic operating conditions.

Oregon Bridge Danglers Hope to Delay Shell's Arctic Drilling

Protestors rappelled off a bridge in Portland, Oregon on Wednesday hoping to delay Royal Dutch Shell's Arctic oil exploration this summer by blocking the return

'Kayaktivists' to Launch Blockade of Shell Icebreaker

A small group of protesters and activists are gathering at the Cathedral Park boat ramp in Portland, preparing to stay for a 24-hour vigil as they wait for Royal Dutch Shell Oil's icebreaker ship,

 
 
Maritime Careers / Shipboard Positions Maritime Standards Naval Architecture Navigation Pipelines Port Authority Ship Electronics Ship Simulators Sonar 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: 0.2122 sec (5 req/sec)