Mariner Alerts

ALERT: Although most right whales have left the Gulf of St. Lawrence for the season, its still important to take care. 

Check Back for the 2022 Schedule.  

Below you will find information on the 2021 Cabot Strait Voluntary Slowdown.  Be sure to check WhaleMap for the most recent visual and acoustic observations of right whales, and to download the WhaleALERT app for assistance in navigating in whale-inhabited waters.

Cabot Strait Voluntary Slowdown

April 28 - June 29 + September 29 - November 15, 2021


Cabot Strait is a key migratory pathway for the critically endangered North Atlantic Right Whale.

To help prevent a lethal collision with these whales, vessels transiting through Cabot Strait are requested to voluntarily slow down to 10 knots or less over the ground, when safe to do so.

Please find more information about the Voluntary Slowdown from the following English, French and multilingual flyers.


Need more background information? 

Check out these documents for additional information on right whale critical habitat and distinguishing features!