Dolphin AIP submarine for India’s Project-75I

As per latest reports from The Financial Express, Germany is offering next-generation submarines to India to jointly build six conventional submarines under Project-75I. While there is no official confirmation, the talks over the submarine which took place during German Chancellor visit to India, However, its being reported that the German Submarine offer is at the final stage.

Its being reported that Germany has offered its HDW Class Dolphin2 submarines which is equipped with fuel cell based Air Independent Propulsion (AIP) system.

Indian Navy already has experience of operating German Submarines. The Shishumar-class submarines which are currently in active service with the Indian Navy Indian variant of the Type 209 submarines developed by the German yard Howaldtswerke-Deutsche Werft (HDW) having displacement of 1,850 tonnes. The Indian Navy currently operates 4 Shishumar-class submarines which are: INS Shishumar, INS Shankush, INS Shalki, INS Shankul.

HDW Class Dolphin AIP Submarine

The Dolphin class submarine is a diesel-electric submarine developed in Israel and constructed by HDW of Germany, for the Israeli Navy. The Dolphin-1 was Israeli version of German Type 209 submarines whose derivative Shishumar class submarines are even operated by Indian Navy.

Israel Navy currently operates 3 Dolphin-I class submarines and 2 Dolphin-II class and one more under construction. Dolphin-II is largest undersea craft built in Germany since the Second World War. The HDW Class Dolphin AIP Submarine is integrated with fuel cell AIP system which significantly increases the submerged endurances. The submarine has an approximate length of 68.6m, pressure hull diameter of 6.7m and surface displacement of 2050t. The submarine can host 36 crew. The Dolphin-II is having speed in excess of 25knots and tested at a depth of 350m.

Weapons include ten swim-out torpedo tubes – four 650 mm-diameter and six 533 mm-diameter tubes. It is also integrated with a new state-of-the-art combat system. Its weapon expulsion system allows the submarine to launch torpedoes, missiles and mines from the weapon tube set. Besides the high fire power, this class of submarine provides a very high automation degree of the controls for the propulsion plant, navigation and handling of the boat.

Dakar-class submarine

The German firm TKMS is also working on new submarines for Israel Navy which will replace the Dolphin-I submarines in service. On 20 January 2022, Israel’s Ministry of Defense officially contracted TKMS to construct the three diesel-electric attack submarines, at a cost of EUR €3 billion.

This submarine is being called as The Darkar class submarine which features a new design.

If Indian Navy is looking for collaborating with Germans, which is the strongest contender, it must go for Darkar class design.

According to a computer-generated rendering released by TKMS, the design of the Dakar class appears to be similar to the Dolphin-class submarines and the concept art of the Type 212CD submarine, currently being built for the German Navy and the Royal Norwegian Navy.

The submarine will have length greater the 80m which makes it longer than Dolphin-II. It has additional space for deploying unmanned underwater vehicles (UUV) or unmanned aerial vehicles (UAV). While the details about the armament of the Dakar class is not revealed but it has been reported that apart from its torpedo tubes, the submarine may incorporate vertical launching system (VLS) cells, capable of firing submarine-launched ballistic missiles (SLBM), or submarine-launched cruise missiles (SLCM).

The Dakar class would be the second class of conventionally powered, air-independent propulsion (AIP)-equipped submarines capable of carrying and launching ballistic missiles; the first one is the KSS-III submarine – operated by the Republic of Korea Navy, although it carries ballistic missiles in its hull, not in its sail. Inclusion of an enlarged sail along the hull will enable the submarine to carry UUVs, SLBM/SLCM.

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