Image001

Featured Story

Img 2361

America's first Tier IV, SCR tug delivered

Earl W. Redd, the first tractor tug in America to enter service in compliance with the US Environmental Protection Agency (EPA)'s Tier IV environmental standards by use of a selective catalytic reduction (SCR) system, was christened in February by owner Harley Marine Services of Seattle.

An SCR system scrubs emissions by converting nitrogen oxide (NOx) into ammonia, which is then absorbed by ceramic bricks built into the engines. The technology significantly reduces the amount of NOx, particulate matter and hydrocarbons released into the environment, and makes the 37-metre vessel one of the cleanest-running tugs in terms of marine emissions.

Built at Diversified Marine's shipyard in Portland, the Earl W. Redd is the first of seven such tugs in development by designer Jensen Maritime.

Earl W. Redd is equipped with modern Rolls-Royce US 255-P30-FP Z-drive propulsion and two Caterpillar 3516E diesel engines, for a rated 3,700kW. Two, 125-kilowatt-hour John Deere generator sets provide the tug's electrical power.

Jensen designed the vessel to carry up to 485m3 of fuel; 24.7m3 of fresh water; 4.3m3 of lube oil; and 4.78m3 of hydraulic oil. The towing gear consists of a Markey, double-drum, towing winch, with 800 metres of towing wire mounted on the stern and a Markey ship-assist hawser winch on the bow.

A large pilot house provides all-around visibility, and the deckhouse has an open feel with a large mess and lounge area along with accommodations for a 10-person crew.

Following the christening, the Earl W. Redd joined Harley's Olympic tug-and-barge operations along the US West Coast, including in Alaska, the Puget Sound and on the Columbia River.

Latest News

Piracy resurgent of Somalia?

Following more than four years with no reported piratical attacks off the  Somalian coast , the hijacking o...

Combination tug and dive support for Peruvian Navy

The Peruvian Navy has recently taken delivery of a well-equipped dive support vessel (DSV) from the shipyard...

Metal Shark's new passenger vessel order

Metal Shark has won a contract for four 26.3-metre catamaran passenger ferries, destined for operation wit...

New pilot boat for the Strait of Messina

The busy Strait of Messina which separates the island of Sicily from the Italian mainland is now home to a n...

ATBs for ITB

Vancouver-based Island Tug and Barge (ITB) is currently working on its most ambitious and innovative project...

Electrified

Is there a place for a battery powered workboat? My thinking for this question comes from observing two partic...

Making it easier to be good

By MICHAEL GREY MBE There would have been a few ripples right across the maritime world at the news a few weeks...

Is CITES failing humanity?

Two meetings of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) will...

Under the seas

Two pieces of news over the past month or so got me thinking about the use of underwater research labs. The f...

The generation game

By MICHAEL GREY MBE Early in my journalistic career, I became the maritime editor for a new weekly magazine, ...

Turkish SAR craft to receive MTU engines

Rolls-Royce will supply MTU diesel engines for six new search and rescue vessels to be built by Damen Shipyard...

Norsepower receives €2.6 million to develop rotor sail

Norsepower has been selected to receive €2.6 million (US$2.9 million) in funding to further its research and d...

Eltorque releases the QT50

Eltorque, a Norwegian supplier of electric valve control, has launched a new super-compact valve actuator. “T...

Caterpillar Marine to establish new marine centre in Singapore

Caterpillar Marine is establishing a new marine centre in Singapore in the facility previously occupied by Cat...

ShipSpace VR design tool unveiled

Knud E Hansen has released its new “ShipSpace” design verification tool. The ShipSpace product is a virtual ...

Advertisements

Banner atd 2412 300x250 300x250 2 24ea07d7e56534588920fccf04b0c49e
Horizon