Tichý class submarine

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Class overview
Builders:	Royal Shipyards of Isselmere-Nieland
Operators:	Royal Isselmere-Nielandic Navy
Preceded by:	Nowotny class submarine
Cost:	Ƿ 3 Md
General characteristics
Type:	Fleet submarine

Contents 1 Project Tichy (Design SS-11) 2 Hull 2.1 Form 2.2 Construction 3 Powerplant 4 Weapons 5 Proposed specifications 6 Operational history 7 Notes

Project Tichy (Design SS-11)

The SS-11 is a highly automated interceptor submarine capable of attaining speeds of 45 knots. The boat is a quiet^[1] deep-depth design with superb handling qualities that allow it to slip under or through enemy anti-submarine pickets when searching for its prey, whilst its high speed, excellent manoeuvrability, and wide range of countermeasures permit it to evade the opponent’s immediate responses. The various systems, from reactor to weapons control, are designed for operations with a skeleton crew of approximately thirty ratings, petty officers, and officers. In spite of the boat’s high performance and small crew, the SS-11 is a safe, reliable boat crafted to spend more time at sea than moored in port.

Hull

Form

At first glance, the hull form of the SS-11 is what one might expect from a high-speed submarine. A squat, streamlined sail blends into the hull offering the least hydrodynamic resistance but tremendous directional stability. The SS-11’s forward control surfaces are mounted high on the front hull, into which they may be retracted to reduce the chance of their damage in harbour. The rear control surfaces consist of five fins, one vertical and two horizontal, and two at about forty-five-degrees from the horizontal plane. These rear fins give the SS-11 unparalleled manoeuvrability even at high speed, permitting 180-degree turns at 40 knots in about thirty seconds.

Unlike many RSIN submarines, the pointed bow terminates abruptly in a slightly pugged nose. This different shape creates a bow wave that minimises turbulence and, consequently, the noise generated along the hull improving the boat’s high speed characteristics and acoustic performance.

Construction

As with all new RSIN submarine designs, the SS-11 features a double hull. The outer or light hull of the SS-11 is typically coated with a layer of insulating anechoic tiles of vulcanised synthetic rubber that reduces acoustic emissions from the submarine as well as returns from active sonar systems pinging for the boat. The light hull itself is of high strength paramagnetic austenitic steel separated from the pressure hull by austenitic steel spacers and ring supports, allowing the boat to reach great depths without fear of structural failure.

A further layer of protection has been added to the pressure hull in the form of amorphous steel-sheathed ballistic ceramic plates that give the hull additional protection against anti-submarine weapons. The plates are backed by a further thin layer of synthetic rubber to minimise radiated noise from within the hull and to attenuate some of the damage that might be caused by supercavitating weapons that might breach the light hull. A further layer of these plates serve to shield the reactor from attack.

The pressure hull is of lightweight, high strength titanium alloy that protects the crew and less pressure resistant systems from damage at great depths. The hull consists of six watertight compartments as well as a small compartment within the fin that serves as the crew’s deep-submergence escape module (DSEM). Other than the DSEM, the hull possesses two escape hatches – one fore, the other aft – with compression chambers and requisite submarine escape and immersion equipment (SEIE) within each as well as the DSEM.

Electric and electronic components in areas likely to suffer possible immersion are saltwater-safe, thereby minimising the risk of short-outs, fires, or the release of harmful substances.

Powerplant

Instead of opting for a potentially more powerful and heterodox reactor, the engineers at the Isselmere-Nieland Nuclear Energy Commission (INNEC) provided the Royal Shipyards with a variant of the tried and tested RA(PW)-8 pressurised water reactor that powers the Nowotny-class fleet attack submarine. The resultant RA(PW)-8B reactor is a compact, raft-mounted, very high pressure design driving the boat through integrated full electric propulsion (IFEP) with brushless motors offering maximum efficiency and quiet operation. The reactor’s pipes and pumps to sustain the high pressure necessary to exploit the hull form and powerplant to their fullest potential are well muffled and insulated against radiating sound, heat, or other emissions that might be hazardous to the crew.

Six Lyme and Martens Canary SNC.1^[1] reactor maintenance robots enable the small crew to work with little risk of powerplant malfunction. Should the crew, the reactor criticality monitoring system (RCMS), or one of the Canaries detect a loss of coolant or any other ominous rise in reactor temperature, the reactor may be automatically scrammed^[1] or, should that not prove enough, pumps connected to the submarine’s main ballast and trim tanks can inject further seawater into the coolant loop. The RCMS offers a healthy safety margin that chief engineers may bend but not break, triple checking for possible errors within the reactor or the system itself. Radiation from the reactor and its associated systems is strictly monitored to ensure that even those working in close proximity to them remain safe.

The enclosed design of the SS-11’s propulsor is most effective at high and very high transit speeds (between 25-45 knots). Consequently, the submarine is relatively^[1] quiet at high speed albeit comparatively uneconomical,^[1] yet still quiet, at lower velocities.

A small auxiliary air-independent propulsion unit (AAIPU) connected to the IFEP may be used in case of reactor malfunction. The AAIPU is powerful enough to restore pressure to the reactor’s cooling system in the event of scramming or to power the boat home at about 2.5 knots.

Weapons

Due to size restrictions, the GWLS.36U missile tubes that have been fitted to RSIN-designed fleet attack submarines have been omitted from the SS-11. Instead, the boat has the now-standard eight-cell GWLS.65U sub-surface-to-air missile launchers (firing the GWS.65U Kite intermediate-range fire-and-forget missile), two 660mm torpedo tubes and four 585mm torpedo tubes. The boat may carry either four 650-660mm weapons and eighteen 533-585mm devices, including two Squid DSM.2 uncrewed underwater vehicles (UUV), or six of the larger weapons and fourteen of the smaller weapons. The proposed loadout for Royal Isselmere-Nieland Navy SS-11s is listed below:

Tichy-class submarine payload

• Configuration 1 (4 × 660mm, 18 × 585mm)
  • 4 × GWS.41U2 Loon anti-submarine missiles
  • 2 × GWS.52U Pelican anti-shipping missiles
  • 12 × GWS.64U2 Mako 533mm heavyweight torpedoes
  • 2 × GWS.79U Beluga 650mm heavyweight torpedoes
  • 2 × GWS.89U Sailfish supercavitating weapons
  • 2 × Squid DSM.2 UUV
• Configuration 2 (6 × 660mm, 14 × 585mm)
  • 4 × GWS.41U2 Loon anti-submarine missiles
  • 4 × GWS.52U Pelican anti-shipping missiles
  • 8 × GWS.64U2 Mako 533mm heavyweight torpedoes
  • 2 × GWS.79U Beluga 650mm heavyweight torpedoes
  • 2 × GWS.89U Sailfish supercavitating weapons
  • 2 × Squid DSM.2 UUV

Proposed specifications

Construction: Double-hull; Outside layer: vulcanised synthetic rubber anechoic tiles; light hull and spacers: high strength austenitic steel; pressure hull: titanium alloy
Displacement: 4582.5 t (full load, submerged)
Dimensions: length: 84.36m; beam: 9.94m; draught: 7.6m
Compartments: 6 fully pressurised, 1 partly pressurised (fin)
Propulsion: 1-shaft supercavitating propulsor; very high pressure, high-density pressurised water fission reactor (INNEC RA(PW)-8B, 200 MW) and piping is heavily muffled.
Speed: Burst: 45+ kts.; maximum sustained speed: 34+ kts.; tactical speed: 25 kts.; maximum silent operation: 12+ kts. (14.37 kts.)
Depth:

• Operating depth: standard: 500m+; maximum: 800m
• Crush depth: 1020m

Crew: 46 (may be operated by as few as 30, i.e. 26 ratings, 4 officers)
Weapons:

• AAW: 8-cell GWLS.65U (fin)
• GP: 2 × 660mm TT (ff), 4 × 585mm TT (ff) (20-22 TT-fired weapons maximum; 4-6 × 650mm weapons, 18-14 × 533-588mm weapons)

Vehicles: 2 × Squid DSM.1, 3 × Canary DMNC.1 (not included in base price)
Electronics suite:

• Computer complex: MEI.5 Muninn (ISOMS)
• Threat management systems: UEQ.187b Skald (anti-torpedo), UEQ.269 Archerfish (anti-air); UDQ.270 (signature self-recognition)
• Radar: URU.327 (multifunction search and tracking), URN.143 (navigation)
• Sonars: UQU.276 (bow, MF/LF), UQR.277 (flanks), UQR.278 (towed array), UQS.268 (interception), UQQ.251 (mine detection)
• ECM/ESM: ULQ.267 (jammer), ULR.191 (radar/signals emissions receiver and direction finder), ULR.192b Delling (laser warning receiver), UWD.198 (signals direction finder).
• Communications: CSZ.17b Godi (Link 17.2; secure datalink), UUZ.122 Hermod (secure satellite communications system), GQZ.128b Dvalin (Link 17.2U; encrypted acoustic modem), UUZ.194 (ELF communications), UWZ.195 (secure communications system), GSZ.196U (encrypted burst transmission communications), UJZ.200 (secure underwater laser datalink).
• Countermeasures: ULQ.136 Remora (anti-torpedo; 4 external, 1 double-tube reloadable), ULE.140 MUSE (anti-missile, 32-cell)

Cost: $1865.2 million USD
Production time: tbd

Operational history

Notes

v • d • e  Naval ships of Isselmere-Nieland Aircraft carriers Fleet carriers Royal Edmund · Royal Holly · Alfred I Light carriers Walmsley Major surface combatants Cruisers Huise · Isling Destroyers Daurmont · Glaines Frigates Furtive Amphibious warfare vessels Helicopter assault Sundburgh Transport docks Angforth Dock landing ships Erlsford Submarines Ballistic missile submarines Wentworth Cruise missile submarines Pechtas · Shrovesport Fleet submarines Thunradar · Nowotny · Tichý Patrol submarines Stórbec · Hanulf · Refshákarl