Oscar-class submarine vs Romeo-class submarine

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ASubmarines

Oscar-class submarine

Nuclear-powered cruise missile submarine

Credit

Sergey Konovalov · CC BY 4.0 · Resized · CC BY 4.0 · Source ↗ · Modified

BSubmarines

Romeo-class submarine

class of Soviet diesel-electric submarine ,

Credit

photograph was taken by the US navy · Public domain · Resized · Public domain · Source ↗ · Modified

First system

Second system

At a glance

Side by side

Length comparisonOne shared metre scale

Oscar-class submarinemaximum

155 m

Length source ↗

Romeo-class submarineLength

76.6 m

Length source ↗

Lengths retain their source configuration and measurement scope.

Oscar-class submarinelarger figure on 2 of 2

Beam+172%
Draught+73%

Romeo-class submarinelarger figure on 0 of 2

None

Counts only measures both sources give with the same scope. A larger figure is not a better system.

Measured figures

Head to head

15 of 40 rows sourced on both sides

155mmaximum

76.6m

Length

All recorded figures & sources

155 m

maximum

Single source

155 m (508 ft 6 in) maximum^[source]

76.6 m

Length

Single source

Configuration

Details

Oscar-class submarine and Romeo-class submarine configuration
Specification	Oscar-class submarine	Romeo-class submarine
Power	2 × pressurized water cooled reactors, HEU ≤ 45%^[source] 2 × steam turbines delivering 73,070 kW (97,990 shp) to two shafts^[source]	Two diesels delivering 2.94 MW (4000 shp) with two electric motors driving two shafts.^[source]
Name	Oscar II class^[source]	—
Builders	Sevmash^[source]	Krasnoye Sormovo Shipyard , Gorky Wuchang Shipyard ( Wuhan ) Guangzhou Shipyard ( Canton ) Jiangnan Shipyard ( Shanghai ) Bohai Shipyard ( Huludao ) Mayang-do Naval Shipyard ( North Korea ) - Assembly site of North Korean kits from China .^[source]
Operators

Preceded by	Papa class Charlie class^[source]	Whiskey-class submarine^[source]

Succeeded by	Yasen class^[source]	Foxtrot-class submarine Type 035 submarine^[source]

Built	1975–2022, may be restarted^[source]	—

In commission	1980–present^[source]	—

Planned	20 (2 949, 18 949A)^[source]	—

Completed	14 (2 949, 11 949A, 1 09852)^[source]	133^[source]

Canceled	6 (2 incomplete, 4 never laid down)^[source]	—

Active	6 (modernization of some boats to 949AM)^[source]	—

Laid up	2^[source]	—

Lost	1^[source]	—

Retired	5?^[source]	109^[source]

Type	Nuclear-powered cruise missile submarine^[source]	—

Endurance	120 days^[source]	—

Test depth	600 m^[source]	—

Armament	4 × 533 mm (21.0 in) and 2 × 650 mm (26 in) torpedo tubes in bow 28 × 533 mm and 650 mm weapons, including RPK-2 Vyuga (SS-N-15 Starfish) anti-submarine missiles with 15 kt nuclear warheads and RPK-6 Vodopad/RPK-7 Veter (SS-N-16) anti-submarine missiles with 200 kt nuclear warhead or Type 40 anti-submarine torpedo or 32 ground mines 24 × P-700 Granit (SS-N-19 Shipwreck) cruise missiles with 750 kilograms (1,650 lb) HE or 6 × 100 Mt Poseidon nuclear-powered, nuclear-armed drones^[source]	8 × 533 mm (21 in) torpedo tubes. Six located in the bow and two in the stern. 14 × 533 mm (21 in) anti-ship or anti-submarine torpedoes (including Yu-4 and Yu-1 torpedoes) or 28 mines^[source]

Alternative designation	Oscar II^[source]	—

Country of origin	Soviet Union^[source]	Soviet Union^[source]

Preserved	—	2^[source]

Sensors & processing systems	—	sonar and radar^[source]

Electronic warfare & decoys	—	MRP 11-14^[source]

Former operator · Algeria	—	Algeria^[source]

Former operator · Bulgaria	—	Bulgaria^[source]

Former operator · China	—	China^[source]

Former operator · Russia	—	Russia^[source]

Former operator · Syria	—	Syria^[source]

Role	—	class of Soviet diesel-electric submarine ,^[source]

Source measurement	—	ES5A : Upgraded Type 033, with improvements mainly involving the replacement of equipment of Soviet origin with domestic Chinese systems, which includes: QZHA―10 (Type 779) attack periscope and QDYA―10 (Type 778) general purpose periscope. Addition of H/SQG-2 ranging sonar, Type 063 communication systems, and countermeasure systems. Domestic Chinese Type 801 sonar replaced the original Soviet MARS-24 sonar. The only difference between the Type 801 sonar and the MARS-24 sonar is that there are 24 transducer elements for the Type 801 as opposed to 12 in the original MARS 24, so the Chinese sonar had better accuracy. Domestic Chinese H/SQZ-D reconnaissance sonar (with Type 105 transducers) replaced the original Soviet system, the performance of the SQZ-D is almost identical to the original Soviet sonar it was developed from, except for the sector of scan, which is increased by 15 degrees. Additional noise reduction measures were also adopted. This is the type China originally sold to Egypt in the 1980s.^[source]Romeo-class submarine · Chinese Type 033 Romeo class and its variants; only the objects and conditions stated in this passage Type 033G : Development of the ES5A, with the incorporation of the capability to launch acoustic homing torpedoes ; analog computers installed to achieve automation of, and speeding up of, torpedo fire control calculations that were previously manually calculated. All Chinese Romeos were converted to this standard. The NATO reporting name for this type is rumored to be the Wuhan class .^[source]Romeo-class submarine · Chinese Type 033 Romeo class and its variants; only the objects and conditions stated in this passage Type 033G1 : A single Type 033G was modified to carry 6 YJ-1 (CSS-N-4) anti-ship missiles, this variant is called Type 033G1, with the rumored NATO reporting name of Wuhan A . The missile had to be fired while the boat was surfaced, with a total exposure time on the surface of less than 7 minutes. The most significant improvement, however, is the reduction of noise level by 12 dB.^[source]Romeo-class submarine · Chinese Type 033 Romeo class and its variants; only the objects and conditions stated in this passage ES5B : Development of the Type 033G, primarily intended for export. This is an upgrade package for Romeo submarine users. The primary improvement of this class is the ability to launch wire guided torpedoes and anti-ship missiles (AShM) while submerged. The program originally began in the mid-1980s, and Egypt was reported to be the only customer when China won a contract to upgrade its Romeo-class submarine fleet, including both Soviet built and Chinese built units. This is the last type of Chinese Romeo class submarine; with noise reduction of 20 dB to 140 dB in comparison to the 160 dB of the original Soviet Project 633 submarines acquired by China.^[source]Romeo-class submarine · Chinese Type 033 Romeo class and its variants; only the objects and conditions stated in this passage

Source measurement

—

ES5A : Upgraded Type 033, with improvements mainly involving the replacement of equipment of Soviet origin with domestic Chinese systems, which includes: QZHA―10 (Type 779) attack periscope and QDYA―10 (Type 778) general purpose periscope. Addition of H/SQG-2 ranging sonar, Type 063 communication systems, and countermeasure systems. Domestic Chinese Type 801 sonar replaced the original Soviet MARS-24 sonar. The only difference between the Type 801 sonar and the MARS-24 sonar is that there are 24 transducer elements for the Type 801 as opposed to 12 in the original MARS 24, so the Chinese sonar had better accuracy. Domestic Chinese H/SQZ-D reconnaissance sonar (with Type 105 transducers) replaced the original Soviet system, the performance of the SQZ-D is almost identical to the original Soviet sonar it was developed from, except for the sector of scan, which is increased by 15 degrees. Additional noise reduction measures were also adopted. This is the type China originally sold to Egypt in the 1980s.^[source]Romeo-class submarine · Chinese Type 033 Romeo class and its variants; only the objects and conditions stated in this passage

Type 033G : Development of the ES5A, with the incorporation of the capability to launch acoustic homing torpedoes ; analog computers installed to achieve automation of, and speeding up of, torpedo fire control calculations that were previously manually calculated. All Chinese Romeos were converted to this standard. The NATO reporting name for this type is rumored to be the Wuhan class .^[source]Romeo-class submarine · Chinese Type 033 Romeo class and its variants; only the objects and conditions stated in this passage

Type 033G1 : A single Type 033G was modified to carry 6 YJ-1 (CSS-N-4) anti-ship missiles, this variant is called Type 033G1, with the rumored NATO reporting name of Wuhan A . The missile had to be fired while the boat was surfaced, with a total exposure time on the surface of less than 7 minutes. The most significant improvement, however, is the reduction of noise level by 12 dB.^[source]Romeo-class submarine · Chinese Type 033 Romeo class and its variants; only the objects and conditions stated in this passage

ES5B : Development of the Type 033G, primarily intended for export. This is an upgrade package for Romeo submarine users. The primary improvement of this class is the ability to launch wire guided torpedoes and anti-ship missiles (AShM) while submerged. The program originally began in the mid-1980s, and Egypt was reported to be the only customer when China won a contract to upgrade its Romeo-class submarine fleet, including both Soviet built and Chinese built units. This is the last type of Chinese Romeo class submarine; with noise reduction of 20 dB to 140 dB in comparison to the 160 dB of the original Soviet Project 633 submarines acquired by China.^[source]Romeo-class submarine · Chinese Type 033 Romeo class and its variants; only the objects and conditions stated in this passage