Technology study demonstrates importance of the Council’s independent research

Photo shows Coast Guard officer firing a messenger shot line from one Coast Guard vessel to another. This is one method of connecting tow lines between a tug and a tanker.
In this 2016 photo, a U.S. Coast Guard officer fires a messenger line from one military vessel to another. This is one method of connecting tow lines between a tug and a tanker. Photo by Pasquale Sena, U.S. Coast Guard.

A new study evaluating methods of establishing tow lines between an escort tug and a tanker in distress is a prime example of why the Council’s studies are vital.

The Council often hires experts to review equipment technology used in the Prince William Sound oil transportation industry. Sometimes these studies fill a hole or gap where independent research is lacking.

“Very little has been previously written on this topic,” said Alan Sorum, who managed this project and other similar technology reviews for the Council. “In a literature review it conducted, the Council’s contractor, Glosten, found that there is a general lack of published material on this subject and in particular, little guidance on best use practices or what is the most appropriate device to use for a given situation.”

The study looked at a specific piece of equipment called a “messenger line.” Passing a messenger line is the first step in setting up a tow line between a tug and a tanker in distress. The lighter weight messenger line helps responders connect the heavy tow lines.

Retrieving a messenger line can be difficult and dangerous in the rough weather often encountered in Prince William Sound. Depending on the vessel and the technology on board, they may be passed by hand, heaved or thrown aboard, projected by mechanical means, or picked out of the water.

Tough equipment required for Alaska’s harsh climate

Alaska has a state law that requires tankers to carry specially designed towing equipment when traveling through Prince William Sound. This equipment includes a towing wire, floating line and buoy, and a heavy-duty shackle.

These components are all specifically sized to match the weight of the vessel and be able to handle the high winds and seas often encountered in Prince William Sound.

Having this specialized equipment on hand allows rescue tugs to quickly and safely help move a stricken tanker to a safer location.

Conducting the study

Researchers reviewed what devices are commercially available for deploying messenger lines. Next, they developed criteria to evaluate the equipment according to: effectiveness, feasibility, transferability, compatibility, age and condition, availability, environmental impacts, and cost.

These eight criteria were based on another Alaska law, which requires industry to use “best available technology.” This requirement is intended to ensure that equipment meets and is maintained to a high standard.

The equipment options were each assessed and scored.

How will the Council use this information on tow lines?

The Council’s influence depends on quality, accurate research. The Council uses reports like this to help make sure advice given to industry and government officials is well-informed and supported by the best science available. The findings of this latest research effort are being shared with equipment manufacturers, the oil transportation and shipping industries, and regulators.

Read more about the researcher’s recommendations:

Tanker Towline Deployment BAT Review (10.3 MB)

Oil spill prevention and response services transition to new contractor

Link to more photos of new equipment
More photos of new equipment.

Prince William Sound was a hive of activity this summer. On July 1, Alyeska’s marine services contractor transitioned from Crowley Maritime Corporation to Edison Chouest Offshore.

This transition means all of the escort tugs and much of the spill prevention and response equipment in Prince William Sound are brand new, or new to the Sound.

Demonstrations of the new equipment

The Alaska Department of Environmental Conservation required that each vessel and crew member demonstrate their capabilities before beginning service. Each tug, as well as each tug’s captain, had to perform a set of maneuvers which differed according to the vessel and its purpose.

Read moreOil spill prevention and response services transition to new contractor

Changes to oil spill contingency plans approved

Extensive amendments due to transition

Photo of oil spill contingency plans with the caption: What is a contingency plan? A contingency plan, or “c-plan,” outlines steps to be taken before, during, and after an emergency. An oil spill contingency plan contains detailed information on how to prevent an oil spill, as well as response activities in the event a spill occurs. Preventing an oil spill from occurring in the first place is the most effective way to protect human health and the environment. If an oil spill occurs, however, a systematic and well-organized approach is necessary to quickly contain and control a spill. Responding efficiently and effectively to a spill requires advanced planning and preparedness.
What is a contingency plan?

The Alaska Department of Environmental Conservation recently approved major amendments to oil spill contingency plans for both the Valdez Marine Terminal and for the tankers that transport oil through Prince William Sound. Both approvals came with conditions.

Neither the tanker plan, nor the terminal plan was due for a renewal. However, Edison Chouest Offshore is bringing so much new equipment and personnel to their new role as Alyeska’s marine services contractor that major changes were needed to both plans. Major amendments require a public comment period.

Read moreChanges to oil spill contingency plans approved

Council issues position on safe crude oil tanker transit and escort vessel operation in the Sound

The Seward spill response fleet trains for spill response.

The Council voted unanimously on January 18, 2018, to pass a resolution stating that oil tankers and escort vessels should not be permitted to transit through Prince William Sound and into the Gulf of Alaska in weather conditions which have been determined by industry to be unsafe for training.

The resolution was prompted by the upcoming change in marine service contract providers by Alyeska Pipeline Service Company’s Ship Escort/Response Vessel System, including crude oil tanker escort vessel services, effective July 2018. Council executive director Donna Schantz stated, “The oil tanker escort system in Prince William Sound is an essential oil spill prevention measure that is vital to reducing the risk of another catastrophic event, such as the 1989 Exxon Valdez spill.”

“If it is unsafe to train personnel, it is unsafe to transport oil,” said Council Board president Amanda Bauer. “This position does not just apply to the incoming contractor, but sets the standard to which the council feels all future new contractors, equipment and crews should be held. We believe strongly that these standards are needed to ensure the economic and environmental safety of the communities and groups we represent.”

Read moreCouncil issues position on safe crude oil tanker transit and escort vessel operation in the Sound

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