A Sea Service Ribbon is an award of the United States Navy, U.S. Marine Corps, U.S. Coast Guard, the U.S. Army, and the NOAA Commissioned Officer Corps which recognizes those service members who have performed military duty while stationed on a United States Navy, Coast Guard, Army, or NOAA vessel at sea and/or members of the Navy, Marine Corps or Coast Guard who have been forward-deployed with their home unit. Additional awards of the Sea Service Deployment Ribbon, Naval Reserve Sea Service Ribbon, Coast Guard Sea Service Ribbon, Army Sea Duty Ribbon, and NOAA Corps Sea Service Deployment Ribbon are denoted by bronze and/or silver service stars on the ribbon. U.S. Army Sea Duty Ribbon The U.S. Army Sea Duty Ribbon (ASDR) was established on 17 April 2006 as the "Army Sea Duty Ribbon"; its name was changed to its current moniker on 30 June 2010. It may be awarded to active duty soldiers who complete two cumulative years of sea duty on a Class A or B U.S. Army vessel. Duty aboard U.S. Navy, U.S. Coast Guard, U.S. Navy Military Sealift Command, NOAA vessels, or aboard Army leased or foreign and non–military vessels may also qualify if soldiers serving on those vessels have a formally assigned primary mission that is accomplished underway, are in an active status, and are approved for creditable sea service by the Career Sea Pay Office. The Chief of the Marine Qualification Division is the approval authority for award of the ASDR to eligible service members. The ASDR may be awarded retroactively to those personnel who were credited with qualifying service, as defined in regulations, after August 1, 1952. Subsequent awards are authorized upon completion of an additional two years of cumulative sea duty under qualifying conditions. U.S. Army Reserve and U.S. Army National Guard soldiers must have two creditable years in a U.S. Army watercraft unit, including a minimum of 25 days underway annually as well as two annual training exercises underway on a Class A or B army vessel; or a 90-day deployment aboard an army vessel underway. Subsequent awards are authorized upon the completion of additional qualifying periods of sea duty. For mobilized soldiers, one year of sea duty as a mobilized soldier will be credited toward one creditable year as long as minimum underway requirements are met. The U.S. Army Sea Duty Ribbon is 1 3/8 inches wide, composed of vertical