Texas Instruments AN/APQ-110 terrain-following radar (TFR) was reverse engineered, and placed in the nosecone of Q-6 in the same configuration as that of the AN/APQ-113 and AN/APQ-110 on F-111: the TFR was installed just below the attack radar.
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In addition to the need to upgrade its logistics capability and infrastructure, China also decided that nothing-in-its-then-aircraft-inventory could fill the requirement for support missions in the South China Sea.
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This was followed by the Q-6 a new design from the Nanchang Aircraft Factory.