Canadian Hydrographic Service
Central and Arctic Region

CA473111 - Croil Islands to Cardinal

96 HOURS NOTIFICATION PRIOR TO ENTERING CANADIAN WATERS
Effective October 11, 2001, 0000 UTC, all vessels that are:
- of 500 tons gross tonnage or more;
- engaged in towing or pushing a vessel, where the combined tonnage of the ship
and the vessel being towed or pushed is 500 tons gross tonnage or more; or
- carrying a pollutant or dangerous goods, or engaged in towing or pushing a
vessel carrying a pollutant or dangerous goods;must request clearance 96 hours
prior to entering Canadian waters from seaward,
or as soon as practical where the estimated time of arrival of the ship in
Canadian waters is less than 96 hours after the time the ship departed its last
port of call. This will remain in effect until further notice.

AIDS TO NAVIGATION
Buoys marking a narrow or dredged channel are normally established on the edge
of the channel. Light structures established to mark the main channel may be
located in shoal water some distance back of the channel edge.

CABLES
For the mariners' safety, all submarine and overhead cables are assumed to
conduct electric power at high voltages and contact with or proximity to these
poses an extreme danger. Mariners are advised to exercise caution when passing
under all overhead cables and to avoid anchoring or conducting seabed operations
in the vicinity of submarine cables. However if anchors become hooked onto a
cable care must be taken not to sever the cable. Cables installed since the date
of publication of this cell may not be charted. Sufficient clearance must be
allowed under all overhead cables. Actual clearances may differ from charted
values due to changes in atmospheric conditions, ice buildup and/or water
levels. For additional information, consult Notice to Mariners No. 16 of each
year and the appropriate volume of CHS Sailing Directions.

ST. LAWRENCE SEAWAY
For information regarding lock data, limiting vessel dimensions and regulations 
governing the transit of vessels in the St. Lawrence Seaway between the Port of 
Montréal and Lake Erie, refer to the Seaway Handbook; a current copy of this 
publication must be carried on board all vessels transiting the Seaway and may be 
obtained from the Head Office of the St. Lawrence Seaway Managament Corporation, 
Cornwall.

ST. LAWRENCE SEAWAY VESSEL TRAFFIC CONTROL SYSTEM
Traffic Control calling-in point with number; arrow indicates direction of vessel 
movement.

LIMITING FACTORS GOVERNING THE TRANSIT OF VESSELS THROUGH THE 
ST. LAWRENCE SEAWAY LOCKS, CANALS AND CHANNELS BETWEEN THE PORT DE MONTRÉAL AND 
LAKE ERIE

In the Seaway, the maximum permissible draught is designated by the St. Lawrence 
Seaway Management Corporation and the Saint Lawrence Seaway Development Coporation.

The main channels between the Port de Montréal and Lake Erie have a controlling depth 
of 8.2 metres (27 feet).

© Fisheries and Oceans Canada 2017. Published by the Canadian Hydrographic Service. 
A licence is required from the Canadian Hydrographic Service (www.charts.gc.ca) to 
reproduce or distribute this work.

In addition, this product contains U.S. Government works or data, and is published 
with the authorization of the Office of Coast Survey. No copyright is claimed by the 
United States Government under Title 17 U.S.C. with regard to their works or data 
contained in this product. Therefore no license is required from the U.S. Office of 
Coast Survey to reproduce or distribute U.S. data shown on this product.