During the first six months of 1977, "Biddle" operated out of Norfolk along the eastern seaboard and in the West Indies. Those operations included various drills and exercises as well as evolutions with warships of NATO nations and South American countries. On 11 July, she stood out of Norfolk on her way to join the 6th Fleet in the Mediterranean Sea. That deployment brought visits to ports throughout the Mediterranean basin and a variety of training missions, often conducted in company with units of Allied and friendly navies. She completed the cruise on 22 December when she arrived back in Norfolk.