11521--Charleston Harbor and approaches Detailed coverage of Charleston Harbor and Approaches 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, Size (Inches): 43.98 X 34.6, Scale 1: 80,000