ZCZC AA70 AVURNAV BREST 172/26 *SN*A*RICO - ROCHEBONNE - YEU - IROISE SPECIAL OPERATIONS 1. SCIENTIFIC SURVEY FROM 29 APR 26 TO 27 MAY 26 PAR LE NAVIRE THALASSA PRENDRE UN LARGE TOUR 2. CANCEL THIS MSG 272300 UTC MAY 26 NNNN