CA373281 - Cape Hurd to/à Lonely Island Canadian Hydrographic Service Central and Arctic Region CABLES The symbols for submarine and overhead cables do not differentiate between cables conducting electric power, often at high voltages, and other types of utility cables. 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. The clearance of an overhead cable may differ from its charted value due to changes in atmospheric conditions, water levels and other factors. For additional information, consult Notice No.16 in the Notices to Mariners, Annual Edition and the appropriate volume of CHS Sailing Directions. AIDS TO NAVIGATION For complete details of aids to navigation, the larger-scale charts and List of Lights, Buoys and Fog Signals must be consulted. COURSE The recommended courses have been adopted by the Lake Carriers' Association (U.S.A) and the Chamber of Marine Commerce (Canada). VESSEL TRAFFIC SERVICES AND INFORMATION SYSTEM IN CANADIAN WATERS OF LAKE ERIE AND LAKE HURON Traffic services calling-in-point; arrow indicates direction of vessel movement. Mandatory calling-in-points are identified numerically. Voluntary calling-in-points are identified alphabetically. For additional information concerning these services, see Notice to Mariners No.25 of each year. See Notices to Mariners for subsequent corrections on this chart and Notices to Shipping in force for hazards or changes essential for the safety of navigation. © Fisheries and Oceans Canada 2021. 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.