Modern Submarine Discussions

[Sam Manekshaw]

Thanks for great info
but i have 2 questions??
1- How cruise missiles reach sea surface???
2- Types of guidance of torpedoes???

1.In an UGM-109 underwater launch, the missile remains enclosed in its transport canister until it has cleared the torpedo tube. The canister is then ejected, and the booster ignites to propel the missile to the surface. After it is fully airborne, some protective covers are jettisoned, and the flight procedes as in a surface launch. Newer SSNs also have vertical launch tubes for the UGM-109 missile.

2.Torpedoes are guided by any of several systems. The simplest is used in the straight-running torpedo, which is held on a straight course by a gyrocompass and must be aimed in the correct direction at the time it is launched. Acoustic, or homing, torpedoes guide themselves to their targets by sound. A passive acoustic torpedo follows sounds made by the target ship—usually propeller noises. An active acoustic torpedo is equipped with a sonar device that sends out sound waves and homes in on the echoes from the target. Wire-guided torpedoes are electrically guided from the attacking vessel and cannot be jammed or driven off course by the target vessel.
Most modern torpedoes are built with more than one guidance system; most combine active and passive acoustic homing capabilities. The United States Mk-48 heavy torpedo has not only active and passive acoustic homing guidance but also provisions for wire guidance.

 

[Haitham]

and the booster ignites to propel the missile to the surface

is this booster means the engine of the missile that continue the path or a temp. engine only to get the missile on the surface -and it has the idea of work for torpedo- and then main engine complete the journey ??

Newer SSNs also have vertical launch tubes for the UGM-109 missile.

i know that all missile tubes is vertical....there are tubes horizontal like torpedo tubes??
cruise missiles launched from submarines contained in a hydrogen bubble form tube to surface...is that right??

provisions for wire guidance

wire guidance like anti-tank missiles ??
i read that France will deploy new heavyweight torpedo called F21 with fiber optical cable guidance....u mean that???
what i'm wondering....heavyweight torpedoes can reach range about 50 km...the submarine has wire of 50 km!!!???

 

[Manticore]

By FUMIAKI SONOYAMA/ Staff Writer
For MSDF's newest 'ninja' submarines, it's all about stealth - AJW by The Asahi Shimbun
Known as the “ninja of the seas,” Japan’s Hakuryu submarine carries enough firepower to knock out an aircraft carrier with a single blow.

But the Type 89 torpedo is not the vessel’s most effective feature in strengthening Japan’s warning and surveillance operations in its waters.

“A submarine’s greatest weapon is stealth,” Maritime Self-Defense Force Capt. Kaoru Yoshida said. “Our mere presence that makes (the enemy think) ‘there might be a powerful submarine out there’ is a deterrent.”

In the National Defense Program Guidelines formulated at the end of last year, Japan decided to increase its submarine fleet from the current 16 vessels to 22 over the next 10 years. A key reason for the increase is Chinese maritime forays, including in areas around the Senkaku Islands claimed by both Japan and China in the East China Sea.

Reporters from several media organizations, including The Asahi Shimbun, were allowed to take a trip aboard a Hakuryu submarine for the first time in late February.

The purpose of allowing access to the submarine was apparently to show that the MSDF can also flex its maritime muscle.

The Hakuryu shown to reporters was the third of the Soryu-class of submarines, which were commissioned from 2009. It has a standard displacement of 2,950 tons and a length of 84 meters.

Before heading out to sea, a “pssh” sound was heard as Capt. Yoshida, 40, gave the order to “begin launch” during a torpedo drill.

Soryu-class submarines can stay submerged longer because they generate energy by mixing fuel with liquid oxygen stored in tanks.

They are more difficult to detect with radar because they extend the air supply tube above the water’s surface far fewer times than the MSDF’s other submarines, which are propelled by batteries when submerged and use diesel engines to recharge the batteries.

A “snorkel” is essential to take in oxygen. But the air supply tubes and periscopes are easily detectable by radar.

“When the snorkel’s up, that’s your best chance to catch a sub,” a P-3C patrol aircraft pilot said.

But the stealth of the Hakuryu submarine comes at a cost in terms of comfort.

The Air-Independent Propulsion engine takes up 10 meters of the length of the submarine’s central section, leaving cramped living quarters for the crew of 65 or so.

The captain’s quarters cover around 3 square meters, while the officers’ quarters have three triple bunk beds to fit nine people in a room.

“It’s tough working in an enclosed space with limited water and air, but I’m motivated to take part in duties that only a few seamen can do,” Lt. Cmdr. Tomoharu Horiuchi, the Hakuryu’s 35-year-old chief engineer, said.

To maintain secrecy, crew members themselves often do not know when they are scheduled to return to their home port.

“We can’t even tell our families when we leave port,” Petty Officer 3rd Class Hayaki Kawai, 31, who has a 10-month-old daughter, said.

 

[sathya]

Japan subs deal risks China ties: SA govt | Australian Defence News & Articles | Asia Pacific Defence Reporter

Germany fights for Australian submarine defence contract after Japan makes a bid for it | Australian Defence News & Articles | Asia Pacific Defence Reporter


India would happily buy soryu , if it's offered to India..

 

[Aepsilons]

Thanks for the update Sir @Manticore !

 

[500]

HMS Talent Surfaces
Royal Navy submarine HMS Talent conducts surfacing drills in the Kyle of Lochalsh, Scotland in December 2009.
Photographer: POA(Phot) Gaz Armes

 

[mike2000]

HMS Talent Surfaces
Royal Navy submarine HMS Talent conducts surfacing drills in the Kyle of Lochalsh, Scotland in December 2009.
Photographer: POA(Phot) Gaz Armes

thats a cool deadly pic.

 

[500]

 

[jammersat]

Can israel's tiny diesel submarines be fitted with those trident missile? cause i have a hard time imagining that

 

[Penguin]

Can israel's tiny diesel submarines be fitted with those trident missile? cause i have a hard time imagining that

The Dolphin class is not tiny, and can fire nuclear tipped cruise missiles rather than ballistic missiles (so compare it to SSGNs, not to SSBNs)

Dolphin 1 class: 1,640 tons surfaced, 1,900 tons submerged
Dolphin 2 class: 2,050 tons surfaced, 2,400 tons submerged

SS(K)
Soryu class (Japan)
Displacement:
Surfaced: 2,900 tonnes (2,854 long tons)
Submerged: 4,200 t (4,134 long tons)

Kilo class (Russia)
Displacement:
Surfaced: 2,300–2,350 tons
Submerged: 3,000-3,950 tons full load

Collins class (Australia)
Displacement:
3,100 tonnes (3,100 long tons) (surfaced)
3,407 tonnes (3,353 long tons) (submerged)

Walrus class (Netherlands)
Displacement: 2,350 t surfaced, 2,650 t submerged, 1,900 t standard

Type 212A (Germany)
Displacement:
1,450 tonnes (1,430 long tons) surfaced
1,830 tonnes (1,800 long tons) submerged

Scorpene ( France)
Displacement:
1,565 tonnes (1,725 short tons) (CM-2000)
1,870 tonnes (2,060 short tons) (AM-2000)
2,000 tonnes (2,200 short tons) (S-BR)

SSN
Rubis class (France)
Displacement: 2400 t (surfaced) 2600 t (submerged)

Trafalgar class (UK)
Displacement: 4,800 tonnes, surfaced, 5,300 tonnes, submerged
Astute class (UK)
Displacement: 7,000 tonnes, surfaced, 7,400 tonnes, submerged

Yasen class (RUssia)
Displacement: 7,700–8,600 surfaced

SSBN
Le Triomphant (France)
Displacement: 12,640 tonne (surfaced) 14,335 tonne (submerged)

Vanguard class (UK)
Displacement: 15,900 tonnes, submerged

 

[kaku1]

 

[halloweene]

The Dolphin class is not tiny, and can fire nuclear tipped cruise missiles rather than ballistic missiles (so compare it to SSGNs, not to SSBNs)

Dolphin 1 class: 1,640 tons surfaced, 1,900 tons submerged
Dolphin 2 class: 2,050 tons surfaced, 2,400 tons submerged

SS(K)
Soryu class (Japan)
Displacement:
Surfaced: 2,900 tonnes (2,854 long tons)
Submerged: 4,200 t (4,134 long tons)

Kilo class (Russia)
Displacement:
Surfaced: 2,300–2,350 tons
Submerged: 3,000-3,950 tons full load

Collins class (Australia)
Displacement:
3,100 tonnes (3,100 long tons) (surfaced)
3,407 tonnes (3,353 long tons) (submerged)

Walrus class (Netherlands)
Displacement: 2,350 t surfaced, 2,650 t submerged, 1,900 t standard

Type 212A (Germany)
Displacement:
1,450 tonnes (1,430 long tons) surfaced
1,830 tonnes (1,800 long tons) submerged

Scorpene ( France)
Displacement:
1,565 tonnes (1,725 short tons) (CM-2000)
1,870 tonnes (2,060 short tons) (AM-2000)
2,000 tonnes (2,200 short tons) (S-BR)

SSN
Rubis class (France)
Displacement: 2400 t (surfaced) 2600 t (submerged)

Trafalgar class (UK)
Displacement: 4,800 tonnes, surfaced, 5,300 tonnes, submerged
Astute class (UK)
Displacement: 7,000 tonnes, surfaced, 7,400 tonnes, submerged

Yasen class (RUssia)
Displacement: 7,700–8,600 surfaced

SSBN
Le Triomphant (France)
Displacement: 12,640 tonne (surfaced) 14,335 tonne (submerged)

Vanguard class (UK)
Displacement: 15,900 tonnes, submerged

Rubis class is outdated and on the verge of replacement by Suffren class.

 

[Penguin]

Rubis class is outdated and on the verge of replacement by Suffren class.

Its what's in service.


Projected successor
Barracuda type Suffren class
Displacement: 4,765 t surfaced 5,300 t submerged

 

[sampeeter]

The Deadliest Submarines in the World
Virginia Class, United States
Akula II Class, Russia
Seawolf Class, United States
Astute Class, United Kingdom
Type 093 Shang Class, China
Trafalgar Class, United Kingdom
Sierra Class, Russia
Victor III Class, Russia
Rubis Class, France
Los Angeles Class, United States

 

[vostok]

Submarine Project 1710 "Beluga"