Addressing U.S. Coast Guard ballast water compliance date extensions: next scheduled drydock

The U.S. Coast Guard understands vessel owners and operators face many challenges in selecting and installing a ballast water management system (BWMS) to meet Coast Guard regulations. We have reconsidered our interpretation of “next scheduled drydocking” with regard to 33 CFR 151 Subparts C and D and are providing additional guidance on what constitutes entry into drydock and the end of an extension period.


A number of vessels have received an extension of the ballast water compliance date that was stipulated as the “first scheduled drydock after (date).” That date referred to the next upcoming statutory out-of-the-water survey for the required inspection of the outside of the ship’s bottom. Based on the schedule for statutory out-of-the-water surveys, these extensions were expected to extend the compliance date no more than five years.

Due to drydock slippage, some of these vessels entered drydock after the date originally reported to the Coast Guard. Other vessels entered drydock before the “first scheduled drydock after (date)” for emergency purposes or to install an exhaust gas cleaning system (scrubber), but with no change to the schedule of statutory out-of-the water hull surveys. Under the terms of the extension letters and the guidance provided in MSIB 13-15, these circumstances substantially affected the original extension period.

The Coast Guard has received multiple requests from vessel owners and operators seeking extension amendments due to drydock slippage or entry into a drydock either for an emergency or for the installation of scrubbers, but not for a statutory out-of-the water survey. As noted in our Maritime Commons blog on March 7, 2018, the Coast Guard normally responded by granting these requests with a 2.5-year extension from the date of the originally scheduled drydock date.

Going forward

The Coast Guard has determined that existing extensions with a compliance date stipulated as the “first scheduled drydock after (date)” will not be affected under the circumstances described above. Vessels that have received an extension stipulated as the “first scheduled drydock after (date)” and subsequently experience drydock slippage, enter a drydock for emergency reasons, or enter for the purpose of installing a scrubber will retain the originally issued extension, provided there is no change to the next scheduled statutory out-of-the-water survey of the ship’s hull for the required inspection of the outside of the ship’s bottom.

A vessel’s statutory out-of-the-water survey for the required inspection of the outside of the ship’s bottom will be verified by vessel records, including the Certificate of Inspection, Passenger Ship Safety Certificate, Cargo Ship Safety Certificate, or Cargo Ship Safety Construction Certificate, as applicable.

The Coast Guard will provide vessels with updated language that reflects the intent of the originally issued extension. This updated language will tie the extension termination date to the vessel’s out-of-water statutory survey schedule, not to exceed five years. For those vessels that already received 2.5 year extensions due to one of the reasons listed above, we will be sending letters to clarify the beginning and end of the originally issued extension period.

Janenne Pung