Mine counter measure ships USS Warrior, foreground, and USS Pioneer prepare to be floated off Military Sealift Command chartered M/V Tern, a float-on/float-off transport ship. Warrior, Pioneer and two other MCM ships arrived in Bahrain, June 23. Warrior and Pioneer are assigned to Commander, Task Force 52, supporting mine countermeasure operations in the U.S. 5th Fleet area of responsibility.