The warship is packed with sophisticated state-of-the-art weapons and sensors such as surface-to-surface missiles and surface-to-air missiles.
The owners of the ship and legal experts have already reached Nigeria for negotiation.
It is learned that half of the 16 Indian sailors aboard the vessel were handed over to Nigeria on Friday.
It was on August 8, when MT Heroic Idun was anchored on the international maritime border of Nigeria after experiencing technical issues, that the vessel was detained by Guinea Navy.
The crew members have been stopped from being handed over to Nigeria through diplomatic-level intervention. Fifteen of the crew members, including two Keralites, were shifted to a hotel.
The Central Government had on Tuesday intervened to prevent the transfer of the Malayali officer arrested by Equatorial Guinea to Nigeria.
The Central Government on Tuesday intervened to prevent the transfer of Malayali officer Sanu Jose arrested by Equatorial Guinea to Nigeria.
After the arrest, Sanu Jose was shifted to an Equatorial Guinea navy ship.
The Kochi native Sanu Jose is the Chief Officer of the ship 'MT Heroic Idun'.
Nilammel NKP House V Vijith, the brother of Vismaya who committed suicide owing to dowry harassment in Kollam, is among the detained sailors.