The Montreal-Lake Ontario section is generally open water except for scattered areas of broken ice in parts of the South Shore canal and in the Beauharnois canal above Beauharnois lock. One-way navigation is in effect through these areas, except on Lake St Francis. Navigation may be restricted to daylight hours until the commissioning of lighted aids has been completed. Mariners are warned to exercise extreme caution in the use of winter markers and lighted aids as their position may have been affected by moving shore ice. The installation of navigation aids is in progress.
Further information is available from the appropriate traffic control centres.
Icebreaker assistance is available in the Beauharnois Canal and Lake St Francis. It is extremely important that ships transiting through ice covered areas and around the ice booms in the Beauharnois canal proceed at the slowest safe speed in order not to disturb the ice fields. Keep to the north of the channel, as there is ongoing work in the area. The Galop ice boom has been removed from the channel. This draft will remain in effect as per the conditions outlined in Seaway Notice no.