Seaway Notices

Seaway Notices address issues specific to a given navigation season, and serve to complement the regulations found in the Seaway Handbook. The notices (which take the form of general Seaway notices applicable to the entire St. Lawrence Seaway, and regional notices which may be applicable to the Montreal / Lake Ontario region or to the Welland Canal) are disseminated via e-mail broadcasts to subscribers.

To subscribe free of charge to receive Seaway Notices and / or Radio Messages, click here.

2021 – #21 Closing of the 2021 Navigation Season

November 16, 2021

2021 – #20 Mandatory Vaccination Required to Access SLSMC Structures – Revised

October 26, 2021

2021 – #19 Mandatory Vaccination Required to Access SLSMC Structures (Cancelled 2021/10/26)

October 25, 2021

2021 – #18 Revised Restrictions on Cruise Ships in Canadian Waters

July 16, 2021

2021 – #17 Increased Draft Due to Hogging

June 3, 2021

2021 – #16 Speed Management Changes – Permanent

May 10, 2021

2021 – #15 Lockage Process without Mooring Lines

May 3, 2021

2021 – #14 U.S. Coast Guard Security Boarding Location Change

March 19, 2021

2021 – #13 Screening and Access to Canadian Locks

March 11, 2021

2021 – #12 Restrictions on Cruise Ships in Canadian Waters Due to COVID-19 (Cancelled 2021/07/16)

March 11, 2021

2021 – #11 Request for Notification of Any Person or Crew Member on Board With Serious Illness or COVID-19 Symptoms

March 11, 2021

2021 – #10 Speed Management Changes

March 11, 2021

2021 – #9 Maximum Permissible Draft – Montreal to Lake Ontario

March 11, 2021

2021 – #8 Automatic Identification (AIS) Requirements

March 8, 2021

2021 – #7 Reporting Dangerous Cargo

March 8, 2021

2021 – #6 Tie-Up Service at Lock Approach Walls

March 8, 2021

2021 – #5 Notification Requirement for Use of Lines at HFM Locks

March 8, 2021

2021 – #4 General Notice

March 8, 2021

2021 – #3 Communications

March 8, 2021

2021 – #2 Mooring and Casting off in Locks

March 8, 2021

2021 – #1 Opening of the 2021 Navigation Season and Maximum Allowable Drafts

February 15, 2021

2020 – #22 Changes in Special Agreement Cut-Off Time for the Montreal Lake Ontario Section

December 21, 2020

2020 – #21 Closing of the 2020 Navigation Season

November 17, 2020

2020 – #20 COVID-19 Notification Requirements

October 2, 2020

2020 – #19 Restriction on Passenger Vessels

June 1, 2020

2020 – #18 Transit Requirements under High Flow Conditions – Cancelled

May 25, 2020

2020 – #17 Maximum Permissible Draft – Montreal to Lake Ontario

May 25, 2020

2020 – #16 Transit Requirements – Operational Bow Thruster (Cancelled 2020/05/25)

May 1, 2020

2020 – #15 HFM Cast-Off Procedure for Upbound Ships in Canadian Locks

April 30, 2020

2020 – #14 Transit Requirements – Operational Bow Thruster (Cancelled 2020/05/01)

April 9, 2020