CoastalHellenic Navigational Warnings - NavwarnsMessages523/26523/26SÉCURITÉReceived 22 Apr 2026, 00:00 UTCCopy textShow on mapSharePrintExportWarning textPositions open on the mapNAVWARN 523/26 SOUTH IONIO SEA.KATAKOLO HARBOUR. MOLE HEAD GREEN LIGHT IN POSITION: 37 38 53N -021 19 14E UNLITLocation mapOpen on the full mapKeywordsUNLITMore 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 warnings529/262026-04-23archivedNAVWARN 529/26 THERMAIKOS GULF. THESSALONIKI PORT. ESTABLISHMENT OF TEMPORARY LIGHTBUOYS. A) YELLOW FLASHING LIGHTBUOY IN POSITION: 40 37 35N – 022 54 11E FOCAL537/262026-04-24archivedNAVWARN 537/26 CENTRAL AEGEAN SEA. OINOUSSES ISLAND. S.BREAKWATER HEAD OINOUSSES HARBOUR. RED LIGHT IN POSITION: 38 30 38N – 026 13 10E UNLIT.543/262026-04-24NAVWARN 543/26 NAVWARN 532/2026 CANCELED. NORTH IONIO SEA. LEFKADA CHANNEL.FLOATING SWING BRIDGE FROM 24 APR 2026 UNTIL FURTHER NOTICE THE OPENINGS FOR TRANSITIEarlier warnings524/262026-04-22archivedNAVWARN 524/26 NAVWARN 340/2026 CANCELED. 524/2026 NORTH AEGEAN SEA. THERMAIKOS GULF. PORT OF THESSALONIKI. TEMPORARY LIGHTBUOYS DEFINITELY UNLIT. TEMPORARY GRE522/262026-04-21NAVWARN 522/26 NORTH AIGAIO SEA.THERMAIKOS GULF. THESSALONIKI BAY. PROHIBITION OF TRANSIT, ANCHORAGE AND ANY OTHER ACTIVITIES FOR ALL SHIPS AND PLEASURE CRAFTS.518/262026-04-21archivedNAVWARN 518/26 THERMAIKOS GULF. PORT OF THESSALONIKI. EXECUTION OF HARBOUR WORKS AND ESTABLISHMENT OF LIGHTS MARKING WORK AREA. FROM 21 APRIL 2026 UNTIL FURTHERBack to Hellenic Navigational Warnings - Navwarns