US Coast Guard Navigation Center

• Local Notice to Mariners (LNM)

• Light Lists Online

• Light Lists Corrections

• Navigation Rules

• GPS Overview

US Coast Guard Office of Bridge Programs

• Bridge Clearance Guide (Waterways listed in alphabetical order)

• Bridge Lighting & Other Signals

US Coast Guard Sector Baltimore

National Oceanic & Atmospheric Administration (NOAA)

• Electronic Coastal Pilot

• U.S. Nautical Chart No.1  -  Symbols, Abbreviations & Terms

• Nautical Charts Online  -  Atlantic

• Chesapeake Bay

• Chesapeake Bay Cove Point to Sandy Point

• Chesapeake Bay Sandy Point to Susquehanna River

• Chesapeake Bay Eastern Bay & South River; Selby Bay

• Chesapeake Bay Severn & Magothy Rivers

• Annapolis Harbor

• Chester River; Kent Island Narrows, Rock Hall Harbor & Swan Creek

• Chesapeake Bay Choptank River & Herring Bay; Cambridge

• Nautical Chart Updates / Critical Corrections

• Nautical Chart Products

National Geospatial-Intelligence Agency (NGA)

• Maritime Safety Information

• Publications

• Publications Updates / Corrections

• Broadcast Warnings

Online Charts
Calculators (Depth / Distance / Great Circle / Speed / Weather / ...)
Wind Scales (Beaufort, Saffir-Simpson, Dvorak, Weather Map, ...)

Distance Between Major World Ports

Visual Gateway to Major World Marinas

Get Google Earth

Google Ocean & Marine

Google Maps