New Right Whale Slow Zone: SE Nantucket, MA

On June 29, 2024, the NOAA North Atlantic Right Whale Sighting Survey detected the presence of right whales southeast of Nantucket, MA. The slow zone is in effect through July 14.

Locations and effective dates are listed below. 

Mariners are requested to avoid or transit at 10 knots or less inside the following Dynamic Management Area (DMA) where right whales have been detected. Please visit our website for more information.

Waters bounded by:
NORTHERN BOUNDARY: 40°52' N

SOUTHERN BOUNDARY: 40°16' N

EASTERN BOUNDARY: 67°45' W

WESTERN BOUNDARY: 68°35' W

Note: This announcement reflects the cancellation of the southwest of Martha's Vineyard DMA following the determination that the detection on June 27, 2024 did not qualify the area for a Slow Zone.

Mandatory speed restrictions of 10 knots or less (50 CFR 224.105) are in effect for vessels 65 feet or larger in the following areas:

North Atlantic right whales are on the move along the Atlantic coast of the U.S. If seen, remember that approaching a right whale closer than 500 yards is a violation of federal and state law.

Endangered North Atlantic right whales are approaching extinction. There are approximately 360 individuals remaining, including fewer than 70 reproductively active females. Human impacts continue to threaten the survival of this species.

In August 2017, NOAA Fisheries declared the increase in right whale mortalities an “Unusual Mortality Event,” which helps the agency direct additional scientific and financial resources to investigating, understanding, and reducing the mortalities in partnership with the Marine Mammal Stranding Network, Canada’s Department of Fisheries and Oceans, and outside experts from the scientific research community.

Details and graphics of all of all vessel strike management zones currently in effect.

Download the Whale Alert app for iPad, iPhone, and Android for real time updates on Slow Zones, SMAs, and other right whale sightings.

Recent right whale sightings and real-time acoustic detections along the eastern seaboard. 

Find out more about our right whale conservation efforts and the researchers behind those efforts.


Spread the Word!All boaters from Maine to Virginia, or interested parties, can sign up for email or text notifications about the latest Right Whale Slow Zones. You can also follow us on Facebook (@NOAAFisheriesNEMA) and Twitter (@NOAAFish_GARFO) for announcements.Share our video on Right Whale Slow Zones.
Questions?Media: Contact GARFO Public Affairs