Stratotanker a and refuelers could be helping re-load fire tankers.
But some of these others are interesting:
Boeing E-6 Mercury is a communications relay – conveys instructions from the National Command Authority to fleet ballistic missile submarines, a mission known as TACAMO (“Take Charge And Move Out”).
Boeing P-8 Poseidon operates in the anti-submarine warfare (ASW), anti-surface warfare (ASUW), and shipping interdiction roles. It is armed with torpedoes, Harpoon anti-ship missiles, and other weapons, can drop and monitor sonobuoys, and can operate in conjunction with other assets, including the Northrop Grumman MQ-4C Triton maritime surveillance unmanned aerial vehicle (UAV).
Boeing KC-46 Pegasus is an American military aerial refueling and strategic military transport aircraft
P-8A Poseidon is designed for long-range anti-submarine warfare (ASW), anti-surface warfare (ASuW), and intelligence, surveillance and reconnaissance (ISR) missions; defined by a unique combination of state of the art sensors, proven weapons systems, and a globally recognized platform.
The P-8s Indian variant is referred to as P-8I. The aircraft plays a crucial role in being the eyes of the Indian Navy and carrying out critical maritime operations. They provide India’s maritime warriors a significant edge in the strategically important Indian Ocean region.
Northrop Grumman E-8 Joint Surveillance Target Attack Radar System (Joint STARS) is a United States Air Force airborne ground surveillance, battle management and command and control aircraft. It tracks ground vehicles and some aircraft, collects imagery, and relays tactical pictures to ground and air theater commanders.
Lockheed U-2, nicknamed “Dragon Lady”, is a high altitude reconnaissance aircraft. It provides day and night, high-altitude (70,000 feet, 21,300 meters), all-weather intelligence gathering. The U-2 has also been used for electronic sensor research, satellite calibration, scientific research, and communications purposes.