In the case of full-service non-directional stations, a modification of the license application can be submitted to rectify geographic coordinates by up to 3 seconds in latitude and/or up to 3 seconds in longitude [§73.1690(b)(2)]. The actual distance can vary due to the Earth’s curvature but typically falls within a range of about 300 to 350 feet in latitude and 200 to 250 feet in longitude. Any changes or corrections to full-service directional antennas, however, will necessitate a construction permit.