11509--Tybee Island to Doboy Sound Detailed coverage of Tybee Island to Doboy Sound 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):35 X 43.5, Scale 1:80,000