International Marine Authorities

• Canadian Coast Guard (CCG)
• United States Coast Guard

Great Lakes & Seaway System

• Great Lakes St. Lawrence Seaway System
• Great Lakes - Seaway Handbook

Notice to Mariners

• Canadian Notice to Mariners
• Great Lakes St. Lawrence Seaway Notices
• United States (U.S.) Notice to Mariners
• British Admiralty (B.A.) Notice to Mariners

Canadian Tide Tables

• Fisheries & Oceans Canada

Water Levels

• Canada - Fisheries & Oceans
• Port of Montreal - Water Level

Canadian Sea Ice

• Environment Canada - Canadian Ice Service

Canadian Shipping News

• Canadian Sailings
• Boat Nerd

International Weather Forecasts

• Environment Canada - Local Forecast
• Environment Canada - Marine Forecast
• NOAA - U.S. Marine Forecast
• NOAA - U.S. National Weather Forecast

Marine Purchasing & Ship Supply Associations

• IMPA - International Marine Purchasing Association
• ISSA - International Ship Suppliers Association

Shipping Discussions and Topics

• ShippingTalk.com