The Coast Guard announced last week that Merchant Mariner Credentials (MMC) that expire between March 1 and Sept. 30 are now extended until March 31, 2021. Mariners who are actively working on expired credentials that meet the extension criteria must carry the expired credential with a copy of Marine Safety Information Bulletin (MSIB) Number: 08-20, Change 3).
The Coast Guard also extended Medical Certificates that expire between March 1 and Sept. 30 until Dec. 31, 2020. Mariners who are...
https://www.workboat.com/news/government/coast-guard-again-extends-mmc-endorsements/