USCG flags ballast water management breaches

The US Coast Guard (USCG) has reacted to ‘a number of reports’ of vessels discharging untreated ballast water, reminding operators that sequential exchange affords compliance only under IMO rules.

An investigation into the incidents, which occurred on vessels beyond their compliance date for USCG rules and without a valid extension, found that the sequential exchange method allowed under regulation D-1 of the IMO’s Ballast Water Management (BWM) Convention had been misinterpreted as applying to the US regulations.

In a post on the US Maritime Commons blog today, the USCG noted: “These Statements of Compliance [allowing sequential exchange] are issued under the provisions of the BWM Convention, which the US is not signatory to. Under the US ballast water regulations, meeting the BWM Convention requirements for sequential exchange is not an acceptable method for vessels beyond the compliance date without a valid extension.”

Vessels beyond their compliance date can use several BWM methods when operating in US water, including a US type approved BWM system or alternate management system; ballast water taken only from the US public water system ; discharge to an external treatment facility; or refraining from discharging within 12 nautical miles of the US coast.

Sequential exchange is a process whereby ballast tanks are emptied until the ballast pumps lose suction. Tanks are then further stripped by eductors before fresh ballast is taken in.



After replacing the all-rubber cutlass bearing of his new Jeanneau Sun Fast 35 Tide The Knot a frust... Read more


A mid-ocean loss of steerage due to a faulty rudder bearing wasn't a scenario Luke Fisher wanted to ... Read more

Experts Highlight Viable Power and Propulsion Solutions for Next Generation Vessels

Lithium-ion battery expert Dr John Warner is presenting at the NEXT GENERATION Marine Power & Propul... Read more

AtZ add stabilizer repair and maintenance to their comprehensive portfolio of marine engineering solutions

Customers within the leisure cruise, naval and passenger ferry industries, are heavily reliant on co... Read more

Mercator Media upgrades magazines and conferences brands

February 2018 Fareham UK - Mercator Media Ltd, the international, market-leading B2B marine media bu... Read more

P&E 2017 deemed a resounding success

Taking place between the 10th-11th May, the 2017 conference welcomed high calibre speakers, delegate... Read more

View all