In one of the world's largest tenders for multirole helicopters, the Indian Navy is planning to procure more than 75 such choppers at an estimated cost of over $4 billion to meet the demand of its expanding area of operations, Indian media reported on Saturday.

Indian Navy had recently asked global helicopter vendors to prov de details about naval multirole helicopters and is planning to issue a global Request for Proposal (RFP) in this regard very soon.

"The Indian Navy would require more than 75 of these Naval Multirole Helicopters (NMRH) and this would be world's largest tender for multirole helicopters," US defence major Lockheed Martin's vice president for ship and aviation systems George Barton said. Indian Navy is planning to procure these new NMRH for carrying out anti-submarine warfare, Special Forces' operations and anti-submarine and anti-surface warfare.