Silvercrest Submarines are the UK's premier submarine, submersibles, and ROV sales and charter company with contracts performed worldwide.
Please scroll down this page to view:
SUBMARINE ESCAPE SUITS for SALE.
LIFE SUPPORT EQUIPMENT for SUBMARINES and SUBMERSIBLES.
THROUGH-WATER COMMUNICATIONS for SALE
SUBMARINE and DIVING CHAMBER ACRYLIC VIEWPORTS .
Fibre (fiber) Optic Products, for use on underwater vehicles, ROVs, and various military applications.
SUBSEA, SUBMERSIBLE, ROV ELECTRIC MOTORS.
Silvercrest Submarines news letter (06)
Our two-man mini sub (ComSub) recently featured on the "Extreme Machines" programme shown on Discovery Channel TV. The programme is one of a series of six that features a range of transportation by land, air and sea. The latest film discussed the history and operation of submarines.
Silvercrest Submarines news letter (05)
Silvercrest Submarines can arrange Submarine and Rov Maintenance, also Pilot Training courses for purchasers. Submersible Refit and Certification programmes. Whatever your underwater vehicle requirements, just ask us and we will support you. Further information available on request.
Silvercrest Submarines news letter (04)
As always we have a wide range of submarines (big and small), plus workclass and eyeball Rovs for sale. Priced to suit all budgets and tasks. Silvercrest Submarines can arrange submarine maintenance, and Pilot Training courses for purchasers. Submarine certification and refit programmes can also be provided. Further information available on request.
Silvercrest Submarines news letter (03)
We have a wide range of submarines (big and small), plus workclass and eyeball Rovs for sale. Priced to suit all budgets and tasks. Silvercrest Submarines can arrange submarine maintenance, and Pilot Training courses for purchasers. Submarine certification and refit programmes can also be provided.Click here to read the FULL newsletter...
Silvercrest Submarines news letter (02)
Silvercrest Submarines news letter (01)
Israeli Sub Dakar.
A Submarine Drawing by One of Our Youngest Guests.
Taurus Submarine on the move.
The Taurus dry-transfer submarine in South Africa. After an extended refit programme, completed diving trials with the South African Submarine Service from their base in Simonstown. The pictures shows Taurus being moved by road from Cape Town.
Royal visit to Silvercrest Submarines.
Silvercrest was honoured to receive a visit from His Majesty King Abdullah of Jordan, who expressed great interest in our worldwide submarine activities.
Her Majesty Queen Elizabeth waving to our submarine crew, during a nautical event in England.
Silvercrest Re-Fit Crew South East Asia.
The Silvercrest crew refitting a forty- passenger tourist submarine in Southeast Asia.
Pictures from our Silvercrest Submarine Operations Worldwide.
Pilot controls in submersible LR2.
Mergo Submarine diving in Lake Windemere, Great Britain.
Two Perry submersibles filming the wreck of the Kirk Pride at 780ft off Grand Cayman.
Test Diving a Deep Submersible.
Diving DeepWorker subs in SE. Asia.
Pisces Submersibles operating in the North Sea. These submersibles have an operational depth rating of 3000ft.
The Famous Loch Ness Submarine (sponsored by Swatch Watches). We carried out one thousand dives to 800ft over two summer seasons.
The Mobile Diving Unit (MDU) operating in the North Sea.
Comsub on charter in the Galapagos Islands.
One of our Submarine operations in the Caribbean.
Diving under the Artic ice pack.
Silvercrest Submarine operations in the Indian Ocean.
Pisces 111. operations in the North Sea.
LR Submersibles operating in the North Sea.
SUBMARINE ESCAPE SUITS For Sale.
Escape Suits are now available from Silvercrest, please contact us for
The Submarine Escape Jerkin is designed for crews to escape
from small submarines, and manned submersibles. The jerkin works on a
similar principle to the traditional submarine escape suits used by the
Royal Navy, which have been successfully used on trials from 600ft
(200m) depths. The jerkin is packed in a compact valise bag that can be
easily stowed in a confined space, with one bag per crewmember. The
jerkin features a waistcoat type construction fitted with a stole or
life jacket section, and an ascent hood fully enclosing the escaper's
head. The Submarine escape jerkin can be quickly unpacked and fitted
The Submarine Escape Jerkin is the ideal escape suit
for crews wishing to escape from stranded manned submersibles and other small
submarines being used in the scientific research, underwater leisure,
and other subsea operations. The escape jerkin features a waistcoat type
construction, fitted with a stole or life jacket section and an ascent
hood fully enclosing the escaper's head.
The stole is fed with breathing quality air from an
integrally mounted air bottle (1.4 litre capacity at 200 bar). The
airflow from the stole into the ascent hood is automatically controlled
by a pair of pre-set relief valves. When worn with the hood fully
closed, surplus air is allowed to escape from an aperture at the base of
the ascent hood. Thus always giving the wearer newly replenished air to
breath on his ascent. Capacities: stole 12.5 litres. Ascent Hood 33
This jerkin is fitted with an inner hood for added
comfort and security. It also has waist belt and crutch straps, fully
adjustable to ensure comfort fit. The jerkin is also equipped with a
seawater activated light, whistle, torch and sea marker dye pack.
All the above is contained in a special purpose carry valise that can be easily stowed onboard small manned submersibles or tourist submarines.
Submarine Escape Immersion Equipment Assembly (SEIE Mk 11)
The SEIE. MK11 submarine escape suit is designed for free ascents from depths of 180m (600ft). Once on the surface the suit provides thermal protection to the escaped submariner.
The SEIE comprises a submarine escape and immersion suit, inner thermal liner, and a gas inflated single seat life raft. All contained in a protective stowage valise.
The escape suit is a single garment with hood, splashguard, and ankle adjusters that can be donned within 40 seconds by the submariner. Manufactured from lightweight, high visibility, durable fabric. Fitted with inflatable stole and two pressure relief valves. Whistle. Nose clip. Charging connector valve.
The single seat life raft is attached to the escape suit by a short lanyard, and manufactured from high visibility, durable fabric. Fitted with gas inflation cylinder, splashguard, and battery operated light. Packed in a storage valise 30.5x 22.8x 7.6cm.
Total size and weight of the SEIE.MK10 when stored on the submarine (suit and life raft) is 7kg, dimensions 35x 33x 19cm.
Length overall 2130mm
Breadth (arms horizontal) 1920mm
Length (sleeve seam to cuff) 690mm
Length (inside leg) 1100mm
Width (seat – suit) 820mm
Weight (Kg) 7.9kg
Complete packed assembly includes Escape Suit, TPG and Life-raft.
Escape Suit body material. Polyurethane coated Nylon (Fluorescent orange)
Life-raft Buoyancy chamber material. Two Ply Butyl
Assembly Valise outer material. FR Polyurethane coated Polyester (yellow)
The Design configuration status of the SEIE Mk 11 is controlled in accordance with the requirements of the European Standard EN ISO 9001 (Design and Manufacturing Quality Management Systems)
The complete assembly is divided into three separate items consisting of:
SEIE Mk 11 Escape Suit
SEIE Mk 11 Thermal Protection Garment (TPG)
SEIE Mk 11 Single Seat Life raft
The three assemblies are hermetically sealed into protective foil envelopes and packed into a protective carrying valise, marked with the RFDB Part number and the NSN.
The complete packed assemblies are stored in air-tight foil envelopes with sufficient desiccant to ensure their working life for up to twelve years.
Submarine Escape Immersion Equipment* (SEIE), also known as *Submarine Escape /and/ Immersion Equipment* is a British designed whole-body suit, and one-man life raft that allows submariners to escape from a sunken submarine. The suit provides protection against hypothermia, and allows survivors to escape a disabled submarine at depths down to 600 feet (183 m), at a rate of eight or more men per hour.
The SEIE is designed to enable a free ascent from a stricken submarine and to provide protection for the submariner on reaching the surface until rescued. The assembly comprises a submarine escape and immersion suit, an inner thermal liner, and a gas-inflated single-seat life raft, all contained in an outer protective stowage compartment. The suit not only keeps the escapee dry and protected from cold shock during escape, but also acts as a thermally efficient immersion suit on reaching the surface. Full protection is therefore provided while deploying and boarding the life raft. The suit provides sufficient lifting force to take the escapee from the submarine to the surface at a safe speed of approximately two to three meters per second.
The British SEIE Mk-10 has been used in Royal Navy Submarines for a number of years. The British designed SEIE MK-10 is scheduled to replace all Steinke hoods aboard U.S. Navy submarines in the near future.
In 2000 the USS TOLEDO became the first US submarine to have the fully operational and certified British escape system. By 2002 twelve other SSN-688 Class submarines had received the system, and all Los Angeles Class submarines would eventually be equipped with this system. As of early 2007 all Virginia-class and Los Angeles-class submarines had been modified, and only two Sea wolf-class submarines still had to be refitted. The ballistic missile submarines were also undergoing modifications at that time. The reconfiguration of escape trunks and training of the crews are requirements prior to installing the new system.
To use the equipment, submariners put on the suit and then enter the rescue chamber onboard the submarine. Once in the chamber and ready, the submariner signals by tapping on the inside of the chamber with a ball-peen hammer. Then the chamber is flooded, which takes about 90 seconds at 600 feet. When the water pressure in the chamber is equal to the water pressure on the outside, the outer door to the chamber opens, and the escapee shoots to the surface because of the buoyancy of the suit.
PLEASE CONTACT US TO DISCUSS YOUR SUBMARINE ESCAPE EQUIPMENT REQUIREMENTS.
LIFE SUPPORT EQUIPMENT for SUBMARINES and SUBMERSIBLES.
EMERGENCY EQUIPMENT LIFE SUPPORT EQUIPMENT for SUBMARINES and SUBMERSIBLES.
Silvercrest can supply life support equipment and consumables for your submarines and manned submersibles. For example:
Sodasorb and Sofnlyme CO2 absorbent.
Other items of submarine equipment on request.
COMMUNICATIONS (UWT) for SALE.
2000 Through-water Communication
(UWT and UQC) systems
now available for sale.
Subcom 2000 Underwater Communications System is designed for use in diving bells, small submarines and manned submersibles. The system
provides subsurface communications (UQC and UWT) between the submarine
and the surface (or other submarine) in clear speech, by acoustically
passing messages through the water column between two transducers.
The system can be powered either directly from the submarine onboard
power source, or alternatively by use of its own battery pack (minimum
of 20 hours under normal conditions).
Subcom 2000 incorporates an extremely reliable single side-band, suppressed
carrier system. Operating at 10Khz or 27KHz with 4.2KHz bandwidth.
Users can select between Subcom 2000 surface unit and Subcom 2000
A small submarine operation would have on the surface support vessel, one surface unit (10Khz and 27Khz transducers with cables, and microphone). The submarine could select to have onboard a 10Khz and 27Khz transducer, microphone, and either the surface unit or the bell unit (depending on space available).
additional information concerning equipment for sale contact:
SUBMARINE ACRYLIC VIEWPORTS.
SUBMARINE VIEWPORTS & DIVING CHAMBER ACRYLIC VIEWPORTS.
Silvercrest is supported by one of the largest manufacturers in the world of PVHO acrylic windows, and acrylic viewports for submersibles, pressure vessels, and diving chambers.
We can supply Flat Disc acrylic viewports, Conical acrylic viewports, hemispherical acrylic viewports, and Spherical and Cylindrical shapes. All are subject to strict inspection and are manufactured to a standard exceeding the requirements of ASME PVHO 1-2007. Authorities available to inspect our acrylic viewports include Lloyds Register, A.B.S, D.N.V, and Germanischer Lloyds.
The acrylic material used to manufacture these submersible and diving chamber viewports is "Transpalite® SS" which was developed during the 1980’s. This is a very high grade Acrylic used in the manufacture of ASME / PVHO viewport windows, pressure cylinders and for many high specification engineered products. This material has been and is still a specified material for many engineered acrylic products. All products are polished to a very high standard by experienced and conscientious technicians. With the aid of conventional polishing mops and our attention to detail we can offer a high quality visually perfect polished finish.
PVHO acrylic viewports.
SUBMARINE & DIVING CHAMBER VIEWPORTS.
Acrylic viewport examples:
Replacement Acrylic Domes for wet-bell systems that are undergoing refurbishment. We can offer an Acrylic Dome 1200mm l/d x 600mm high, 15mm thick clear cast acrylic, with a 50mm flange drilled with 20 holes.
Eighteen acrylic viewports for a Drass saturation diving system, with a maximum diving depth of 1000ft. Each viewport to be Flat Disc with O-ring, size 190mm diameter x 45mm thick. PVHO documentation and Lloyds inspection to be provided for each viewport.
All viewports will be manufactured to exactly match your old units.
Replacement Acrylic viewports for a decompression diving system. Acrylic conical viewports for air dive DDC to ASME PVHO standard. Design pressure 290 Psi. Complete with PVHO certificates. The viewports will be manufactured to exactly match your drawings. Viewport Tolerances: Diameter: +0.0mm / -0.2mm. Thickness: +0.2mm / -0.2mm.
Acrylic domes, viewports, and hulls for manned submarines, submersibles, and diving systems.
PLEASE CONTACT US WITH YOUR REQUIREMENTS.
For all your submersible viewport and diving chamber viewport requirements, please contact us.
Fibre (fiber) optic products, for use on underwater vehicles, ROVs, and various military applications.
Silvercrest/Linden Photonics specialize in the bespoke manufacture of fibre (fiber) optic products, for use on underwater vehicles, ROVs, and various military applications. These products are used throughout the offshore Oil and Gas, Telecommunications, security, and Defence industries.
We offer high quality fibre (fiber) optics that are typically used as underwater tethers for either torpedo or ROV guidance. We specialize in developing rugged fibre (fiber) optic cables for underwater applications. While we have a number of standard products, most often our clients are seeking a semi-customized product that will require a specialized design from our in-house technical support team. For example, higher tensile strength, varied OD, multiple channels, and electrical/optical hybrid cable.
Our cables are often less expensive than competing cables owing to our patented manufacturing process. We have a unique extrusion technique that allows us to manufacture a very rugged and durable cable at low cost. At the present time we are having great success with our tether cable not only in the commercial market, but also in the military market, and we are seeing interest worldwide as the world's naval forces fibre (fiber)ize their fleets. Our product is excellent, our prices very competitive, and our delivery schedule the best in the industry.
We are at the forefront of this technology, specializing in the development of innovative, high performance yet cost effective packaging solutions for optoelectronic and microelectronic systems for defense and commercial customers. Our objective is to be a strategic partner to agencies of the Department of Defense, their prime contractors, and advanced technology firms; to develop and deploy cost effective packaging solutions for optoelectronics and microelectronics that are hermetic, radhard, chemically inert and are enabled by incorporating Linden’s proprietary, ruggedized optical cable technology.
We have gained valuable knowledge relating to the mechanical properties of various LCP resins, and the way in which these properties vary with tool design, process temperature, speed of extrusions and filler materials. Furthermore, we have developed knowledge of the radiation resistance and moisture barrier properties well beyond that available prior to our research. These core competencies are directly related to developing optical cable for markets such as DoD torpedo guidance, ocean floor exploration, and communication buoys. Our commercial markets are oil drilling and exploration, chemical sensors, electro-optical packaging and virtually any environment requiring rugged compact cable.
LCP jacketed optical fibre (fiber) cable has great potential in the area of packaging for electro-optic devices. One of the major challenges facing the packaging engineer is that of creating the hermetic seal around the optical input and output ports. LCPs have excellent barrier properties, are easily molded with great precision, and being thermo plastic, can be bonded with relative ease. It is therefore possible to use LCP both for the hermetic packaging and the fibre (fiber) jacket. This monolithic approach has the advantage that no special preparation of the fibre (fiber) is required. Expensive metallized pigtails can be replaced by short lengths of LCP jacketed fibre (fiber) that is robust and easy to handle.
Linden prides itself on having introduced innovative, high-quality optical cable products for demanding torpedo guidance, communication buoy and hybrid remotely operated vehicles (HROV). We design and develop high-strength, moisture and radiation resistant, cost-competitive packaging components and optical fibre (fiber) cable using patented liquid crystal polymer (LCP) buffers. Our products provide quasi-hermetic, radiation resistant packages for the military and commercial telecommunications and sensor markets.
Linden's product development began by exploiting the many novel properties of Liquid Crystal Polymers (LCPs). These unique materials are sometimes referred to as self reinforcing polymers, and can exhibit a specific tensile strength ten times that of steel cable.
Most high strength cables require the addition of longitudinal strength members such as Kevlar. The manufacturing process is cumbersome and significantly increases the cost of the cable.
By using LCP buffer over any fiber or wire a maximum alignment of polymer chains yields a high tensile strength. Linden has developed proprietary processes such that thin, extruded strands of LCP have a tensile modulus comparable to Kevlar. Linden has demonstrated that a 30 mil LCP jacketed SMF28 cable has a breaking strength of 55 lbs. and has developed methods of surface treatment to reduce abrasion during the life of the cable.
In addition to high strength, STFOC also exhibits excellent mechanical and thermal stability. By controlling the molecular orientation of the extruded LCP jacket, the expansion coefficient can be matched to that of the fiber. This provides for a high degree of thermal stability, permitting the cable to be used over a very wide temperature range without suffering increased attenuation as a result of microbending. The cable also exhibits excellent chemical and thermal stability. It will survive exposure to organic solvents, acids, and fuel oils.
In conjunction with molded LCP packages Linden is at the forefront of technology, providing innovative functionally hermetic, radiation resistant packages to the military and commercial, telecommunications and sensor markets.
Linden continues to expand its product portfolio and design expertise through ongoing internal research as well as collaboration with some of the world's most renowned technology companies.
Strong Optical Cables.
A proprietary Strong Tether fibre (fiber) Optic Cable (STFOC) for torpedo guidance applications that can be manufactured at a fraction of the cost of existing cables. The closest competing product, FOMC (also called Ruggedized Microcable™ Tether Cable) is cost prohibitive for even military applications. Linden’s cable, STFOC, is only a fraction of this cost and is a drop-in replacement for FOMC for many applications. STFOC at 30mm diameter has a breaking strength of 50 lbs and can be deployed at high speeds through metal umbilicals.
Hermetic Optoelectronic Packaging.
Molded LCP near-hermetic packages for use in optoelectronic components are a replacement for the more costly and traditional ceramic and metal packages. Linden’s proprietary LCP buffered fibre (fiber) is used as pigtails and, where it exits the package, sealing is achieved with ultrasonic bonding. Packaging is often 60 to 80 % of the cost of an optoelectronic component. Near-hermetic LCP packages eliminate the need for expensive ceramic and metal packages and expensive metalized fibre (fiber) pigtails. They provide high temperature performance and the ability to mold precise micron scale features into the molded parts.
Buoyant fibre (fiber).
A thin, buffered optical cable for sea-surface communication buoys and hybrid remotely operated vehicles for ocean bed exploration. Linden’s cable is small diameter, high specific strength and buoyant. Linden works closely with other DoD contractors to enable precision spooling of thin optical cable that can be deployed at high speeds.
LCP jacketed optical fibre (fiber) cable & packaging for electro-optic devices can meet commercial needs for a cost-effective alternative to the standard packaging options. One of the major challenges facing the packaging engineer is that of creating the hermetic seal around the optical input and output ports. Such a seal is typically created by stripping and metalizing the end of the fibre (fiber) and then soldering it into a metalized glass sleeve. Finally, the bead is soldered into the metal housing of the device. Stripping and metalizing fibre (fiber) is an expensive, labour intensive and delicate operation, and the cost of a ready-made fibre (fiber) pigtail is typically well over $100. Handling is also problematic as fibre (fiber) breakage during the packaging process is common. Linden’s LCP buffered fibre (fiber) eliminates this problem and is the basis for partnerships with optical component manufacturers.
Linden has developed and continues to develop innovative products in the area of polymer technology. We have developed specialty in-house testing for cables which includes pressure testing, flexibility testing, diameter characterization and cut-through testing. In addition, we now offer cost-effective molding services for precision parts. Our experience with LCP and other high performance polymers allows us to mold very detailed and difficult parts. Our products are expending as well, and we are pleased to announce the introduction of a full line of interconnect products. We now offer an extensive line of copper and fiber connectors and cable assemblies. Markets served include military/avionic, industrial, telecom as well as a line of underwater connectors.
Circular Connectors. Rectangular Connectors. Filter Connectors. RF Coaxial Connectors. Optical Fiber Components.
Contact us to see how we can meet your needs.
Tel: (+44) 1285 760620
SILVERCREST / SME SUBSEA, SUBMERSIBLE, ROV ELECTRIC MOTORS.