More info on the vessel can be found here:
https://balticworkboatsus.com/vessel/pilot-1700-wp/
IMO: - Name: IRAGO 6 PILOT BOAT Vessel Type - Generic: Pilot Vessel Vessel Type - Detailed: Pilot Vessel Status: Active MMSI: 431006513 Call Sign: - Flag: Japan [JP] Gross Tonnage: - Summer DWT: - Length Overall x Breadth Extreme: 20 x 4 m Year Built: - Home Port: - https://www.marinetraffic.com/en/ais/details/ships/shipid:3504653/mmsi:431006513/imo:0/vessel:IRAGO_6_PILOT_BOAT