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Mk.2 first flew in November 1969 and was evaluated by the Royal Navy, being allocated the pennant number P235 and aircraft serial number XW255.
Pennant numbers were originally P-101 to P-106, but were later modified to CM-21 to CM-26, where CM stands for corbeta misilera, Spanish for guided missile corvette.
Until 30 April 1941 she sailed under the Polish ensign (using pennant number H16) but as OF Ouragan (OF - Okręt Francuski - "French ship"), instead of the usual ORP prefix.
The second unit was supposed to be built and delivered by USSR (pennant number K-208), but due to Sino-Soviet split, most on board equipment was not delivered, and the boat was used as sample for reverse engineering to complete the first unit, which entered Chinese service in August 1966.
The KD (Kapal Diraja = Royal Ship) Rahmat (Pennant number F24) was a frigate operated by the Royal Malaysian Navy.