0768/26
Underwater works by R/V Derinsu and Optimus Prime in Marmara Sea - bounded area
Activeuntil 31 Jan 2029, 20:59 UTC (in 818 days)Received 30 Jul 2026, 00:00 UTC
Warning text
Positions open on the mapONHO NAVIGATIONAL WARNING NO : 0768/26
MARMARA SEA
1. UNDERWATER OPERATIONS, BY R/V DERİNSU AND OPTIMUS PRIME UNTIL 31 JAN 29 IN THE AREA BOUNDED BY:
40 58.05 N - 028 40.85 E
40 58.30 N - 028 41.55 E
40 56.53 N - 028 43.22 E
40 53.98 N - 028 57.95 E
40 50.15 N - 029 07.58 E
40 52.38 N - 029 14.38 E
40 52.03 N - 029 14.93 E
40 49.62 N - 029 07.43 E
40 53.45 N - 028 57.80 E
40 56.05 N - 028 42.85 E
WIDE BERTH REQUESTED.
2. THIS MESSAGE WILL BE CANCELLED ON 31 JAN 29 AT 2059Z.
Location map
Open on the full mapAnalysis
Activeuntil 31 Jan 2029, 20:59 UTC (in 818 days)Underwater operations are being conducted in the Marmara Sea by R/V DERİNSU and OPTIMUS PRIME in the area bounded by the listed positions. Mariners are requested to give the work vessel a wide berth. The message remains in force until cancellation on 31 Jan 2029 at 2059Z.
Give the work vessels a wide berth and navigate with caution in the bounded area.
- Type
- Offshore operations · severity moderate
- Feed
- Offshore works, rigs and towingAll warnings of this kind on the map, or as an API feed.
- Location
- Marmara Sea
- Validity
- Until 31 Jan 2029, 20:59 UTCTHIS MESSAGE WILL BE CANCELLED ON 31 JAN 29 AT 2059Z.
- Activity periods
- ? - 31 Jan 2029, 20:59 UTC (Until 31 Jan 29 2059Z)
- Hazards
- underwater operations, work vessels on site
Vessels involved
- R/V DERİNSU · work vessel
- OPTIMUS PRIME · work vessel
Coast stations for this area
- RCCMRCC VarnaBulgaria138 NM from the area
- RCCMSRCC AnkaraTurkey200 NM from the area
- RCCMRCC Constanta/Constanta Harbor MasterRomania233 NM from the area
- DSCDSC Station CamlicaMSRCC AnkaraTurkeyMMSI 002711000VHF18 NM from the area
- DSCDSC Station BandirmaMSRCC AnkaraTurkeyMMSI 002711000VHF52 NM from the area
- DSCDSC Station KeltepeMSRCC AnkaraTurkeyMMSI 002711000VHF68 NM from the area
- DSCDSC Station MahyadagMSRCC AnkaraTurkeyMMSI 002711000VHF69 NM from the area
- DSCDSC Station SarköyMSRCC AnkaraTurkeyMMSI 002711000VHF71 NM from the area
Worked out automatically from the warning text on 28 Sept 2026, 03:08 UTC. It can be wrong: the official warning text is the authority.