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Echo-class submarine: Echo I class, Echo II class & Accidents

The Echo class were nuclear cruise missile submarines of the Soviet Navy built during the 1960s. Their Soviet designation was Project 659 for the first five vessels, and Project 675 for the following twenty-nine. Their NATO reporting names were Echo I and Echo II. All were decommissioned by 1994.

Language: English [EN]
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Echo-class submarine topic overview

The analysis highlights Echo I class, Echo II class and Accidents as prominent areas in the source structure around Echo-class submarine.

Related topics
27
Source areas
4
Connected nodes
31
Extracted relationships
44
Concept neighborhoods
17
Bridge connections
31

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Echo I class · 8 topics
Echo II class · 8 topics
Accidents · 7 topics
Overview · 4 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Armament
Echo I : · 6 × P-5 Pyatyorka cruise missiles · 4 × 533 mm (21 in) bow torpedo tubes · 2 × 400 mm (16 in) bow torpedo tubes · 2 × 400 mm (16 in) stern torpedo tubes
Beam
Echo I : 9.2 m (30 ft 2 in) · Echo II : 9.3 m (30 ft 6 in)
Builders
Komsomolsk-on-Amur, shipyard No. 199 · Severodvinsk, shipyard No. 402
Complement
104-109 men (including 29 officers)
Completed
Echo I : 5 · Echo II : 29
Displacement
Echo I : · 3,768 long tons (3,828 t) surfaced · 4,920 long tons (4,999 t) submerged · Echo II : · 4,415 long tons (4,486 t) surfaced

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Echo I class

Echo II class

Accidents

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How Echo-class submarine connects Entity context

The extracted context around Echo-class submarine shows recurring relationship patterns in the source. For example, Echo-class submarine → 2 × 400 mm (16 in) bow torpedo tubes, 2 × 400 mm (16 in) stern torpedo tubes, 4 × 533 mm (21 in) bow torpedo tubes, 6 × P-5 Pyatyorka cruise missiles, 8 × P-6 cruise missiles, Echo I :, Echo II :, Echo II mod :, P-6 replaced with 8 × P-500 or P-1000 (SS-N-12 "Sandbox") missiles Another extracted example is Echo-class submarine → 3,768 long tons (3,828 t) surfaced, 4,415 long tons (4,486 t) surfaced, 4,920 long tons (4,999 t) submerged, 5,760 long tons (5,852 t) submerged, Echo I :, Echo II :. Use these groups to spot repeated connection types before inspecting the individual relationships.

Echo-class submarine

Top relations

Armament · 9
Echo-class submarine → 2 × 400 mm (16 in) bow torpedo tubes, 2 × 400 mm (16 in) stern torpedo tubes, 4 × 533 mm (21 in) bow torpedo tubes, 6 × P-5 Pyatyorka cruise missiles, 8 × P-6 cruise missiles, Echo I :, Echo II :, Echo II mod :, P-6 replaced with 8 × P-500 or P-1000 (SS-N-12 "Sandbox") missiles
Displacement · 6
Echo-class submarine → 3,768 long tons (3,828 t) surfaced, 4,415 long tons (4,486 t) surfaced, 4,920 long tons (4,999 t) submerged, 5,760 long tons (5,852 t) submerged, Echo I :, Echo II :
Speed · 6
Echo-class submarine → 14 knots (16 mph; 26 km/h) surfaced, 15.1 knots (17.4 mph; 28.0 km/h) surfaced, 22 knots (25 mph; 41 km/h) submerged, 24.2 knots (27.8 mph; 44.8 km/h) submerged, Echo I :, Echo II :
Beam · 2
Echo-class submarine → Echo I : 9.2 m (30 ft 2 in), Echo II : 9.3 m (30 ft 6 in)
Builders · 2
Echo-class submarine → Komsomolsk-on-Amur, shipyard No. 199, Severodvinsk, shipyard No. 402
Completed · 2
Echo-class submarine → Echo I : 5, Echo II : 29
Draught · 2
Echo-class submarine → Echo I : 7.1 m (23 ft 4 in), Echo II : 7.4 m (24 ft 3 in)
Length · 2
Echo-class submarine → Echo I : 111.2 m (364 ft 10 in), Echo II : 115.4 m (378 ft 7 in)
Operators · 2
Echo-class submarine → Russian Navy, Soviet Navy
Propulsion · 2
Echo-class submarine → Echo I : 2 pressurized water-cooled reactors 44,500 hp (33 MW) each, 2 steam turbines, 2 shafts, Echo II : 2 pressurized water-cooled reactors 70,000 hp (52 MW) each, 2 steam turbines, 2 shafts

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

echo class ii soviet missile project submarines cruise isbn boats missiles 675 severodvinsk p-500 fire war built 659 submarine komsomolsk-on-amur

Echo-class submarine relationships Subject–Predicate–Object triples

TTTA extracted 44 structured relationships around Echo-class submarine. Examples in this analysis include Echo-class submarine → Armament → Echo I : and Echo-class submarine → Armament → 6 × P-5 Pyatyorka cruise missiles. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
Echo-class submarineArmamentEcho I :1.00infobox
Echo-class submarineArmament6 × P-5 Pyatyorka cruise missiles1.00infobox
Echo-class submarineArmament4 × 533 mm (21 in) bow torpedo tubes1.00infobox
Echo-class submarineArmament2 × 400 mm (16 in) bow torpedo tubes1.00infobox
Echo-class submarineArmament2 × 400 mm (16 in) stern torpedo tubes1.00infobox
Echo-class submarineArmamentEcho II :1.00infobox
Echo-class submarineArmament8 × P-6 cruise missiles1.00infobox
Echo-class submarineArmamentEcho II mod :1.00infobox
Echo-class submarineArmamentP-6 replaced with 8 × P-500 or P-1000 (SS-N-12 "Sandbox") missiles1.00infobox
Echo-class submarineBeamEcho I : 9.2 m (30 ft 2 in)1.00infobox
Echo-class submarineBeamEcho II : 9.3 m (30 ft 6 in)1.00infobox
Echo-class submarineBuildersKomsomolsk-on-Amur, shipyard No. 1991.00infobox
Echo-class submarineBuildersSeverodvinsk, shipyard No. 4021.00infobox
Echo-class submarineComplement104-109 men (including 29 officers)1.00infobox
Echo-class submarineCompletedEcho I : 51.00infobox
Echo-class submarineCompletedEcho II : 291.00infobox
Echo-class submarineDisplacementEcho I :1.00infobox
Echo-class submarineDisplacement3,768 long tons (3,828 t) surfaced1.00infobox
Echo-class submarineDisplacement4,920 long tons (4,999 t) submerged1.00infobox
Echo-class submarineDisplacementEcho II :1.00infobox
Echo-class submarineDisplacement4,415 long tons (4,486 t) surfaced1.00infobox
Echo-class submarineDisplacement5,760 long tons (5,852 t) submerged1.00infobox
Echo-class submarineDraughtEcho I : 7.1 m (23 ft 4 in)1.00infobox
Echo-class submarineDraughtEcho II : 7.4 m (24 ft 3 in)1.00infobox
Echo-class submarineEndurance50 days1.00infobox
Echo-class submarineIn commission19 November 1960–15 July 19941.00infobox
Echo-class submarineLengthEcho I : 111.2 m (364 ft 10 in)1.00infobox
Echo-class submarineLengthEcho II : 115.4 m (378 ft 7 in)1.00infobox
Echo-class submarineOperatorsSoviet Navy1.00infobox
Echo-class submarineOperatorsRussian Navy1.00infobox

Related concept clusters Concept neighborhoods

The concept neighborhoods around Echo-class submarine bring nearby vocabulary together. In this analysis, examples include Submarines, Missile and Missiles. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • cruise missile submarines
    • Missile
    • Missiles
    • Echo
    • Navy
    • Nuclear
    • Submarines
    • Cold
    • Range
    • Ii
    • Soviet
    • Fire
    • P-500
  • cruise missile
    • Missile
    • Missiles
    • Echo
    • Navy
    • Nuclear
    • Submarines
    • Range
    • Ii
    • Soviet
    • Fire
    • P-500
    • Completed
  • echo i class
    • Echo
    • Ii
    • Cruise
    • Missile
    • Guidance
    • Submarine
    • Fire
    • Missiles
    • Submarines
    • Project
    • Accidents
    • Also
  • echo ii class
    • Echo
    • Ii
    • Cruise
    • Missile
    • Missiles
    • Guidance
    • Submarine
    • Fire
    • Komsomolsk
    • Komsomolsk-on-amur
    • Project
    • Range
  • soviet navy
    • Nuclear
    • Submarines
    • Completed
    • Komsomolsk
    • Komsomolsk-on-amur
    • Propulsion
    • P-1000
    • Range
    • Russian
    • Severodvinsk
    • Submarine
    • Soviet
  • soviet far east
    • Submarines
    • Project
    • Cold
    • Russian
    • Submarine
    • War
    • Completed
    • Accidents
    • Cruise-missile
    • Komsomolsk
    • Komsomolsk-on-amur
    • Propulsion
  • komsomolsk
    • Severodvinsk
    • Komsomolsk-on-amur
    • Navy
    • Nuclear
    • Propulsion
    • Vessels
    • P-1000
    • Project
    • Range
    • Russian
    • Submarine
    • P-500
  • missile
    • Submarines
    • Ii
    • Fire
    • Missiles
    • Soviet
    • Komsomolsk
    • Navy
    • Nuclear
    • Vessels
    • Cold
    • Guidance
    • Range

Connections between topic areas Semantic bridges

For Echo-class submarine, one of the stronger structural bridges in this analysis connects Echo-class submarine with Echo I class. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
Echo-class submarine — Echo I class · splits 23 ⟂ 9
Echo-class submarine — Echo II class · splits 23 ⟂ 9
Echo-class submarine — Accidents · splits 24 ⟂ 8
Echo-class submarine — Overview · splits 27 ⟂ 5

Map overview Semantic statistics

Echo-class submarine

Nodes32
Edges31
Triples44
Avg. degree1.94
Density0.0625
Components1

Source & methodology

TTTA analyzes the structure around Echo-class submarine to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Echo I class, Echo II class & Accidents, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Echo-class submarine · EN edition · Analysis: TopicsToTalkAbout

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