The US Coast Guard has released its 2021 annual report on Port State Control. Flag Administration performance for 2021 dropped slightly with the overall annual detention rate decreasing from 0.77% to 0.73%. Additionally, the three-year rolling detention ratio decreased from 1.02% to 0.87%. Barbados, Cook Islands, Liberia, Malta, and the Philippines were removed from the Targeted Flag List this year. In 2021, the Coast Guard issued nearly double the deficiencies for non-compliance with the regulations over the previous year’s numbers. The majority of the deficiencies were issued to vessels with inoperable systems, deficient ballast water management plans, and to those that failed to report mandatory ballast water practices to the National Ballast Water Clearinghouse (NBIC) within specified timeframes. On the positive side, the Coast Guard is seeing a trend of vessels reporting their inoperable systems prior to arrival and a 60% reduction in the number of discharges of non-compliant ballast water into waters of theUnited States.