Voluntary Speed Limit Zone Established East of Boston

A voluntary vessel speed restriction zone (Dynamic Management Area or DMA) has been established east of Boston to protect an aggregation of 11 right whales sighted in this area on April 19.

This DMA is in effect through May 5, 2019.

Mariners are requested to route around this area or transit through it at 10 knots or less. Whales were spotted in or near shipping lanes so please be especially vigilant when traveling in these areas.

DMA coordinates:

42 40 N
42 02 N
070 20 W
071 15 W



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

Cape Cod Bay SMA (through May 15)

Off Race Point SMA (through April 30)

Mid-Atlantic U.S. SMAs (includes Block Island) (through April 30)

Great South Channel SMA (through July 31)