ZCZC JA57 070730 UTC APR GERMAN NAV WARN 204/26 WESTERN BALTIC. EAST OF KADETRENDEN. SURVEY OPERATIONS BY 'NORTHERN STORM/MISA7' COMMENCING IN POSITION 54-357N 012-338E VESSEL WILL BE CROSSING TSS ON POSITION 54-528N 013-024E RESTRICTED MANOEVRABILITY DURING OPERATIONS. BERTH OF 500 METERS REQUESTED. CANCEL GERMAN NAV WARN 188/26 NNNN