ZCZC IA19 240843 UTC OCT BALTIC SEA NAV WARN 031/26 LOW SEA LEVEL THE BELTS: TO LATE SUNDAY EVENING APPROXIMATELY -60 TO -70 CM BELOW BALTIC SEA CHART DATUM IN CONNECTION WITH LOW TIDE WESTERN BALTIC: SUNDAY LATE AFTERNOON TO MONDAY AFTERNOON AROUND -60 TO -70 CM BELOW BALTIC SEA CHART DATUM. THEN RISING. NNNN