Vessels North Sea Giant and Olympic Zeus are performing underwater technical works in Gulf of Finland.
The area is marked with virtual AIS broadcast (V-AIS ATON, special marks):
1. 59°42,66'N 24°05,56'E
2. 59°38,73'N 24°07,43'E
3. 59°37,98'N 24°01,30'E
4. 59°41,91'N 23°59,42'E
Mariners are requested to pass the vessels at a minimum distance of 2 NM.

Contact information:
North Sea Giant. Call sign LAYR7. MMSI 259362000.
Olympic Zeus. Call sign LAUR. MMSI 258060000
The vessels monitor VHF channel 16 and the GOFREP VHF channels in the area.