During the month of June 2018, over 50 percent of towing vessels operating in U.S. waters transmitted incorrect AIS data, and an alarming number of these vessels did not accurately report their dimensions or broadcast a properly assigned MMSI number. This post provides guidance to owners/operators for verifying compliancy with AIS requirements as they work to attain a COI under Subchapter M.
Source: USCG
Link: 7/3/2018: Is your Automated Identification System ready for Subchapter M?