Important Messages

  • 01/14/2015
    Imperial and metric units for 2015 tidal predictions are available in PDF format online.

    As of January 1, 2015 Tide Tables are now printed in metric units only. Imperial and metric unit tide predictions are however available online at Please keep in mind that the only official version required by the Shipping Act carriage regulations is the paper version.

  • 07/25/2014
    Caution with Vertical Clearances

    The Canadian Hydrographic Service (CHS) would like to inform you that the vertical clearances on charts and equivalent BSB 1313, 1314, 4026, 4275, 2250, 2283-1, 2283-2, 4266, 4201 are inaccurate. Caution. Notices to Shipping have been issued. Notices to Mariners will be issued in the next edition.

  • 04/29/2014
    Service Interruptions

    Fisheries and Oceans Canada will be performing maintenance to its network infrastructure from Friday May 9th at 5:00PM EST until Monday May 12th 8:00AM EST. During this work, access to some of our internet sites may not be available. We apologize for any inconvenience that this outage may cause.

  • 04/11/2014
    Protecting your Private Information

    Fisheries and Oceans Canada (DFO) is committed to protecting the confidentiality of our clients' personal information on DFO online applications. The Department acted promptly upon learning about the security issues associated with the Heartbleed Bug. Departmental systems using the affected application have been identified, patched and updated. To further minimize the risks related to this bug, clients using DFO applications may be prompted to change their passwords in the coming days.

  • 11/25/2013
    Explanatory Note Regarding the Practice of CHS on the Communication of Hazards to Navigation

    CHS may receive new information pertaining to navigation from various sources. All information is assessed to evaluate its quality and determine if it is a potential hazard to navigation.

  • 05/02/2013
    Low Water Levels on the Great Lakes

    Water levels in the Great Lakes are below their all-time averages and below last year's levels . The water levels are below the level of Chart Datum for Lake Superior (-0.3 metres), and Lakes Michigan and Huron (-0.4 metres).

    Below average water levels in the Great Lakes are expected to continue into the summer months, according to the forecast prepared by Environment Canada and the United States Army Corps of Engineers. Mariners should exercise extreme caution while navigating in the Great Lakes, especially during periods of strong winds when water levels can rise or fall significantly very quickly.

    Consult Sailing Directions booklet CEN 300 - General Information, Great Lakes for more information on water levels and for a list of voice-announcing water level gauges in the Great Lakes area visit the website:

  • 02/21/2013
    Eliminating Canada – U.S. ENC Overlaps in the Great Lakes

    To comply with internationally agreed practices, Canada and the United States of America have agreed to eliminate overlapping coverage of Electronic Navigation Charts (ENCs).

  • 02/15/2013
    BSB Raster Chart Registration Status

    15-Feb-2013: The maintenance to the BSB raster chart registration server is now complete. Should you experience any difficulties registering your charts, or if you have any questions, please contact us at .

  • 02/05/2013
    The BSB Registration service may be interrupted, from February 6 to 15, 2013

    As a result of a server maintenance, the BSB registration system may be only sporadically available from February 6 to 15, 2013. It is anticipated that the system will resume normal service on February 16, 2013. For any question or concerns, please contact or 1-866-546-3613.

  • 11/16/2012
    Eliminating Canada - U.S. ENC Overlaps

    To comply with internationally agreed practices, Canada and the United States have agreed to eliminate overlapping coverage of Electronic Navigation Charts (ENCs). The first area affected by the changes includes Juan de Fuca Stait, Haro Strait and Boundary Pass, was implemented December 15, 2011. Canada and the United States will continue to resolve ENC overlaps in the Pacific, Atlantic and Great Lakes regions. This new ENC coverage scheme will result in each country changing their areas of coverage, so that only one country's ENC would be available for any given area at a particular scale.

  • 10/31/2012
    Termination of Tracings Production and Distribution

    On December 31, 2012, CHS will no longer produce and distribute Tracings and the associated website section will be closed. As the result of the improved chart production and maintenance processes, CHS no longer needs to produce Tracings to update its charts, so it will no longer be distributing them.

  • 06/29/2012
    Low Water Levels in the St. Lawrence: Recreational Boaters and Mariners Are Urged to Use Caution

    Fisheries and Oceans Canada has issued a public advisory warning that water levels are lower than average in the Port of Montréal and in the Deux Montagnes lake. For the sector between Montréal and Varennes, water levels are below chart datum.