US Coast Guard Navigation Center:

• Notice to Mariners

• Light Lists Online

• Light Lists Corrections

• Navigation Rules

• GPS Overview

US Coast Guard East Coast Port Operations:

• Port Of Baltimore

• Waterway & Port Closures

National Oceanic and Atmospheric Administration (NOAA):

• Free Nautical Booklet Charts

• Recreational Boater Information and Tools For Safe Navigation

• Nautical Charts & Related Products

• Nautical Chart Updates / Critical Corrections

• Wreck and Obstruction Information

• Electronic Coastal Pilot

National Geospatial-Intelligence Agency (NGA):

• Maritime Safety Information

• Publications

• Publications Updates / Corrections

• Nautical Calculators

• Sailing Calculators

Distance Calculator Between Major World Ports

• Online Charts

• Calculators (Depth, Distance, Great Circle, Speed, Weather, Loan, ...)

• Wind Scales (Beaufort, Saffir-Simpson, Dvorak, Weather Map, ...)

Visual Gateway to Major World Marinas

Download & Install Google Earth

Google Ocean : Marine

Google Maps