The Development of Loran-C for Navigation in Harbor and Harbor Entrance Areas

The navigator of an ocean-going ship which transits the high seas, coastal waters, and restricted waters of a harbor entrance is faced with a requirement to fix his position with increasing accuracy and frequency. There may be a need to automate some part, or all, of his navigation processes. Loran-C can satisfy many navigation requirements, but there is a need for additional development before the navigator of an ocean-going ship can use Loran-C to the full extent of its capability. The U. S. Coast Guard is proceeding with a program to maximize the usefulness of the planned Loran-C system for the Coastal/Confluence Zone, to define the requirements for navigation in specific harbor areas, and to identify the information needs of shipboard navigators.