CoastalHellenic Navigational Warnings - NavwarnsMessages697/26697/26SÉCURITÉArchivedReceived: 26 May 2026, 00:00Archived: 31 Oct 2026, 12:08Updated: 14 Nov 2026, 23:05SubscribeCopyShareShow on mapPrintExportSearchKeywordsGeometry refspointGeometry phrasesin positionMalfunctioning AidsUNLITMessage contentNAVWARN 697/26 SARONIKOS GULF. MEGARA CHANNEL. 1ST STARBOARD SIDE FOR INBOUNDING VESSELS. GREEN LIGHTBUOY POROS MEGARON ”1” IN POSITION : 37 58 31N – 023 25 21E UNLIT.Location mapOpen on the full mapMore from Hellenic Navigational Warnings - Navwarns1390/262026-11-13NAVWARN 1390/26 SOUTH AIGAIO SEA GEOPHYSICAL SURVEY WILL BE CARRIED OUT BY ‘NG SURVEYOR’ FROM 13 NOV 2026 IN THE LINE BETWEEN THE POINTS: 37 44 05N – 023 09 37E 37 41 04N-023 12 22E 37 39 23N – 023 181391/262026-11-13NAVWARN 1391/26 SARONIKOS GULF. FLEVES ISLAND. FIRING EXERCISES FROM 16 NOV 26 ON 1500Z UNTIL 2100Z AND FROM 17, 18 AND 19 NOV 26 ON 0900Z UNTIL 1300Z AND ON 1500Z UNTIL 2100Z NOV 26 IN THE AREA CENTE1393/262026-11-13NAVWARN 1393/26 CANCEL NAVWARN 930/2026. SARONIKOS GULF. PSYTTALEIA ISLAND. SOUTHWEST END OF SUBMARINE PIPLINES OF PSYTTALEIA ISLAND. FLASHING YELLOW LIGHTBUOY IN POSITION: 37 55 22N – 023 34 41E CUT758/262026-06-10archivedNAVWARN 758/26 CANCELLATION OF NAVWARN 737/2026. SOUTH AEGEAN SEA. THIRA ISLAND. PORT CONSTRUCTION WORKS. DREDGING OPERATIONS IN PROGRESS. FROM 10 JUNE 2026 UNTIL FURTHER NOTICE IN THE SEA AREA BOUNDE528/242024-04-14archivedNAVWARN 528/24 SOUTH AEGEAN SEA. PAROS ISLAND. DROPPING OF DREDGINGS FROM 15 APR 2024 UNTIL FURTHER NOTICE. DROPPING OF DREDGINGS ΙΝ AREA BOUNDED BY: 37 04 16N 025 03 33E 37 04 16N 025 03 41E 37 04 10Later warnings706/262026-05-27archivedNAVWARN 706/26 NAVWARNS 691/2026,637/2026 CANCELLED.705/262026-05-27NAVWARN 705/26 CENTRAL AEGEAN SEA. OINOUSSES ISLAND KAKOPETRIA SEA AREA DANGEROUS OBJECT-AMMUNITION REPORTED IN POSITION: 38 31 00N – 026 12 43E DEPTH 4M. DISTA709/262026-05-28NAVWARN 709/26 SOUTH EVOIKOS BAY. NEA STYRA. DESTRUCTION OF LIGHT MARKING REEF GLAROS IN POSITION : 38 11 06N – 024 10 31E DANGER TO NAVIGATION.Earlier warnings698/262026-05-26archivedNAVWARN 698/26 SARONIKOS GULF. MEGARA CHANNEL. RED LIGHTBUOY 1ST PORTSIDE IN POSITION : 37 58 30N – 023 25 18E UNLIT.693/262026-05-25archivedNAVWARN 693/26 MYRTOO SEA.SPETSAI ISLAND ANCHORING AND MOORING BUOYS DEPLOYMENT PROHIBITED. FROM 01 APRIL TО 31 ОСTOBER 2026 WITHIN SEA AREA “MEGALI ZOGERIA” BO675/262026-05-22archivedNAVWARN 675/26 NORTHWESTERN AEGEAN SEA. PAGASITIKOS GULF. ALONNISOS ISLAND. PROHIBITION OF NAVIGATION FROM 26 MAY 26 UNTIL 31 ОСТОBER 26 WITH THE EXCEPTION OF TBack to messages