NAVWARN details

Navigational Warnings (NAVWARNs) replace Notices to Shipping (NOTSHIPs) and shall be construed as Notices to Shipping


ID	NW-Q-0311-15
Date	2015-04-17 00:00 UTC To 2022-05-11 18:53 UTC
Status	Cancelled
Title	Calculation of under-keel clearance
Cancelled by	NW-Q-0560-22
Areas	Montréal to Trois-Rivières
Vicinity	SorelMontreal
Categories	Waterway Information (Other)
Description	Since July 25, 2014, Canadian Coast Guard Marine Communications and Traffic Services has been using all Canadian Hydrographic Service water level stations for the calculation of passage authorizations in the SorelMontreal sector, namely Contrecoeur, Varennes, Montreal-Frontenac and Montreal-Jetty No. 1. In light of the particular features of the navigation waterway in the ContrecoeurVarennes sector, it was agreed to adjust upward by 12 cm the water column at these two locations. The minimum water column in the SorelMontreal sector, obtained after adjustment, will be used for the calculation of under-keel clearance
Position	45° 43.422'N 073° 25.642'W
Charts	1310(NAD83), 1310(NAD83), 1311(NAD83), 1400(NAD27); Horizontal positions are based on NAD83.

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