Indian Navy to acquire six to eight Medium-Range Surveillance Aircraft and High Altitude Long Range UAVs. Defence Ministry floated RFIs (request for information) for the surveillance aircrafts and UAVs newspaper reports indicated. Specifications for the Medium-Range Surveillance Aircraft require an operating range of over 350 nautical miles while the requirements for the UAV are service ceiling above 40,000 feet and endurance of over 25 hours. India is also conducting a major upgrade for the Coast Guard. . .