Technical review about the sinked replenishment oiler iranian Kharg.

According to information published by Yahoo on June 2, 2021, the Iranian ship, called the Kharg, sank into the Gulf of Oman after catching fire early. Iranian authorities say the naval ship was headed to open waters for a training mission.
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Replenishment oiler IRIS Kharg (Picture source: Twitter account of North East Heritage Library)

The IRIS Kharg was a modified Ol-class fleet replenishment oiler of the Islamic Republic of Iran Navy, named after Kharg Island. Built by Swan Hunter in the United Kingdom and launched in 1977, it was delivered to Iran in 1984.

Kharg displaced 11,242 tonnes (11,064 long tons) of standard load and up to 33,544 tonnes (33,014 long tons) at full load. It had a gross tonnage of 18,880 and a deadweight tonnage of 9,517 tonnes (9,367 long tons).

Its original installed machinery included a pair of two-drum boilers built by Babcock & Wilcox, that rotated two Westinghouse geared turbine sets.The system was designed to generate 7,000 kW of electricity, and to provide 20.04 megawatts (26,870 hp) for her single shaft coupled with the propeller. The ship was capable of reaching a nominal top speed of 21.5 knots (39.8 km/h; 24.7 mph).

Its original navigation radar was manufactured by Decca Radar, a Decca 1229 model working on I-band, while the installed tactical air navigation system was a U.S.-made URN 20. It was also fitted with Inmarsat.

It was armed with an OTO Melara 76-millimetre (3.0 in)/62 compact gun on its forecastle, as it was designed. The planned armament included two Bofors 40 mm (1.6 in) AA guns, one on the helicopter deck and the other on the forecastle pedestal, that were never installed. It was equipped with four Soviet 23 mm (0.91 in)/80 anti-aircraft autocannons arranged in two twin mounts, as well as two 12.7 mm (0.50 in) heavy machine guns.

Its crew consisted of 248 officers and men. Kharg had a helipad with twin hangars, giving it sufficient capacity to embark three helicopters.

The OTO Melara 76 mm gun is a naval gun built and designed by the Italian defense company Oto Melara.