The Fiat RS.14 was an Italian long range maritime strategic reconnaissance floatplane. The RS.14 was a four/five seat all-metal cantilever low/mid-wing monoplane powered by two wing-mounted 626 kW (840 hp) Fiat A.74 RC engines. It had a conventional cantilever tail unit with a single fin and rudder. Its undercarriage consisted of two large floats on struts. It had a glazed nose for an observer or bomb aimer. The pilot and copilot sat side by side with a wireless operator's compartment behind them. In the bombing role the RS.14 was fitted with a long ventral gondola to carry various combinations of anti-submarine bombs (up to 400 kg).
The RS.14 was designed by Manlio Stiavelli at the CMASA works at Marina di Pisa. The first of two prototypes flew in May 1939.
A prototype landplane version AS.14 was built and first flown on 11 August 1943. It was designed as a ground-attack aircraft and intended to be armed with a 37 mm  cannon and 12.7 mm machine guns. It was not ordered and no others were built.
The RS.14 went into service with the Italian Air Force with a number of maritime strategic reconnaissance squadrons at bases around the Italian coast and also in Sicily and Sardinia. They were used for convoy escort duties and anti-submarine patrols. After the 1943 Armistice a few survivors were operated by the Italian Co-Belligerent Air Force.and the Luftwaffe. At the end of the war the aircraft were used for liaison duties around the Mediterranean carrying up to four passengers.

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