A U.S. Navy petty officer signs an autograph for a local resident upon the arrival in port of two American vessels, the guided missile cruiser USS HARRY E. YARNELL (CG-17) and the guided missile frigate USS KAUFFMAN (FFG-59), are visiting Poland in conjunction with BALTOPS '90, a NATO exercise in the Baltic Sea. Their visit represents the first such port call by American vessels since 1927