12264--Chesapeake Bay - Patuxent River and vicinity Detailed coverage of Chesapeake Bay Patuxent River and Vicinity OceanGrafix provides mariners with the most up-to-date, NOAA-approved nautical charts ever offered Charts are printed only after an order has been received, ensuring the most up-to-date information Meets U. S. and international carriage requirements for commercial vessels, all notice to mariners corrections are applied. U. S. Coast Guard approved, Scale 1: 40,000,Size (Inches): 46.85 X 35.5