https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12241543Edit ImageSaveSaveEditCropCustom TextU.S. Office of Defense Transportation system of port control and its traffic channel control. Sourced from the Library of Congress.View public domain image source hereMorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseEditorial use only JPEGTIFFSmall JPEG 1200 x 886 px | 300 dpiLarge JPEG 3500 x 2583 px | 300 dpiBest Quality JPEG 8820 x 6509 px | 300 dpiTIFF 8820 x 6509 px | 300 dpi | 109.5 MBFree DownloadU.S. Office of Defense Transportation system of port control and its traffic channel control. Sourced from the Library of Congress.More