Titan Submersible. All rescue vessels
There are at least 5 ships operating in the area where the sound was heard (an underwater knock, the alleged crash site of the Titan submersible).

An important vessel is approaching that can provide significant assistance: HORIZON ARCTIC

On June 20, OceanGate Expeditions confirmed that its bathyscaphe with five tourists disappeared while diving to the Titanic that sank in the Atlantic.

upd: + research vessel ATALANTE (perhaps also able to help) + Terry Fox





Батискаф \"Титан\" потерял связь при погружении к \"Титанику\"

Ship on the map:

Polar Prince
IMO: 5329566 MMSI: 316006460 Type: Buoy Lighthouse Vessel
Deep Energy
IMO: 9481154 MMSI: 311036900 Type: Pipe Layer
Atlantic Merlin
IMO: 9557458 MMSI: 316027612 Type: Offshore Tug Supply Ship
ATLANTIC MERLIN
IMO: 9557458 MMSI: 316027612 Type: Offshore Tug/Supply Ship
HORIZON ARCTIC
IMO: 9732838 MMSI: 316003140 Type: Offshore Tug/Supply Ship
CCGS JOHN CABOT
IMO: 9781853 MMSI: 316042572
SKANDI VINLAND
IMO: 9817121 MMSI: 316033737
L ATALANTE
IMO: 8716071 MMSI: 227222000 Type: Research Vessel
Ann Harvey
IMO: 8320468 MMSI: 316003000 Type: Buoy Lighthouse Vessel
Terry Fox
IMO: 8127799 MMSI: 316122000 Type: Icebreaker
total vessels: 10