The USCG recently published a letter concerning watchkeeping policy and workhour limitations on towing vessels, offshore supply vessels (OSVs) and crewboats using a two watch system. This letter is labeled G-MOC POLICY LETTER 4-00 and is dated Sept. 1, 2000. The letter is too long to publish here but may be found online at the USCG web site (www.uscg.mil/hq/g-m/gmhome.htm and using the “Search” button look for “G-MOC Policy 4-00”). It is unfortunate that the letter must be read with several other references handy. They include Title 46 USCA and at least part of the Code of Federal Regulations. The letter goes into a good bit of detail concerning interpretation of the law and regulations concerning hours of work on vessels authorized to use a two watch system.