ZCZC JA43 012201 UTC APR POLISH NAV WARN 072/26 SOUTHERN BALTIC. GEOPHYSICAL WORKS BY VESSEL RAMFORM VANGUARD / C6JF5 MMSI: 311001861 IN AREA BOUNDED BY PSN: 55-30.94N 017-04.66E 55-28.37N 017-04.15E 55-26.60N 017-07.74E 55-25.73N 017-12.81E 55-25.71N 017-23.97E 55-27.15N 017-28.23E 55-30.17N 017-30.36E 55-36.70N 017-27.53E 55-35.22N 017-22.80E 55-32.88N 017-12.88E 55-30.94N 017-04.66E WIDE BERTH REQUESTED AT LEAST 1.0 NM. NNNN