The U.S. Coast Guard has issued a Safety Alert reporting
that a high percentage of antennas attached to Satellite 406 Category I EPIRBs, product number 2754, manufactured by ACR Electronics, Inc. have failed. The company will replace damaged antennas at no cost. The Coast Guard strongly recommends that vessel operators carefully examine their EPIRB antennas, particularly those manufactured by ACR Electronics.
Source: HK Law