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Delta-class submarine

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The R-27 Zyb missile carried by the Project 667s of the late 1960s had a range of just , so the earlier subs were forced to patrol close to the North American coast, whereas the Deltas could launch the >-range R-29s from the relative safety of the Arctic Ocean. In turn the Deltas were superseded by the larger Typhoon class submarines. The early Deltas remained in service until 1990s with treaties such as START I. High running costs and the retirement of the Typhoons′ R-39 missiles meant that some Delta III's were reactivated in the 2000s (decade) to replace the Typhoons.

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Soviet Union, Russian Federation n12: n33:

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yes

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Unlimited, except by food supplies

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Surfaced: 13,500 tons Submerged: 18,200 tons Surfaced: 9,350 tons Submerged: 10,500 tons

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Delta IV class submarine Delta III class submarine Delta II class submarine

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D-9D launch tubes for 16 R-29D SLBM's, four 533 mm and two 400 mm torpedo tubes 16

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5 6

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1

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135 130

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two pressurized water-cooled reactors powering two steam turbines driving two shafts each developing 41 MW two pressurized water-cooled reactors powering two steam turbines delivering 44,700 kW to two five-bladed fixed-pitched shrouded propellers. two pressurized water-cooled reactors powering two steam turbines with two five-bladed fixed-pitched shrouded propellers.

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14 7 4

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A Delta II class submarine A Delta I class submarine A Delta III class submarine A Delta IV class submarine

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300

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8.8 m 9 m

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Delta III & Typhoon class submarines Delta I class submarine Delta II class submarine

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n10: Typhoon class submarine & Delta IV class submarines Delta III class submarine

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12.3 m 12 m

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Surfaced: 14 knots Submerged: 24 knots Surfaced: 24 knots Submerged: 24 knots Surfaced: 12 knots Submerged: 24 knots

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166 m 155 m

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The R-27 Zyb missile carried by the Project 667s of the late 1960s had a range of just , so the earlier subs were forced to patrol close to the North American coast, whereas the Deltas could launch the >-range R-29s from the relative safety of the Arctic Ocean. In turn the Deltas were superseded by the larger Typhoon class submarines. The early Deltas remained in service until 1990s with treaties such as START I. High running costs and the retirement of the Typhoons′ R-39 missiles meant that some Delta III's were reactivated in the 2000s (decade) to replace the Typhoons. , Pavel Podvig and russianforces.org estimated the strength of the Russian strategic submarine fleet at one Typhoon class submarine (used to test the R-30 Bulava missile), four Delta III, and six Delta IV class submarines, and one Borei. They will ultimately be replaced by the new Borei class submarines (also known as the Dolgorukiy class). Five Delta IV boats have been overhauled in recent years, with work continuing on the last one.