Pirates in three skiffs attacked the tanker 214 nautical miles south of Lagos last week, according to Bergen Risk Solutions.
Chief executive Arild Nodland says shots were fired at the ship while underway but none of the crew were injured in the incident.
He says the hit marks the farthest from the Gulf of Guinea shoreline that pirates have struck in the region, surpassing the 2011 targeting of the Baltic Mariner 136 nautical miles from Lagos.
