The deepest diving submersibles with fully acrylic sphere.
Up to 3,000 Meters
Up to 5 Occupants

C-Researcher Series

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360 DEGREE OVERVIEW
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360 DEGREE OVERVIEW
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360 DEGREE OVERVIEW

The C-Researcher series offers scientists, researchers, documentary makers and explorers the most outstanding submersibles ever built. Apart from the fact that these versatile submarines are ideally suited for research, their view, efficiency and speed make them also perfect for those who simply wish take in the views of the deep sea.

The eight different submarines in the C-Researcher series let private explorers and researchers pick the most suitable submersible for their mission objectives.

Design

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Unimpeded view

To experience the underwater world in the optimal way, one of U-Boat Worx’ design priorities has always been the clearest view. To ensure this, our remarkably clear fully acrylic pressure hull has been positioned at the front of the submersible, providing an unobstructed view in every direction, unimpeded by ballast tanks, batteries and other components.

Luxurious and spacious interior

With the C-Researcher series, we have aspired to create the ultimate in luxury interior design. When onboard a C-Researcher, guests enjoy exhilarating views from a sumptuous chair in a comfortable air-conditioned environment with variable airflow, adjustable from each seat. You can also enjoy music from a hi-fidelity Bluetooth sound-system and even chill your favourite drinks in a cold-storage box.

Large access hatch

You embark the submarine through its top-hatch. This is a large opening on the top that allows for comfortable entry into the interior of the submersible.

Sonar

This compact ultra-wide (130-degree) field-of-view instrument has a range of 100 meters, which acts as a second set of eyes when navigating the subsea terrain.

Unimpeded view

To experience the underwater world in the optimal way, one of U-Boat Worx’ design priorities has always been the clearest view. To ensure this, our remarkably clear fully acrylic pressure hull has been positioned at the front of the submersible, providing an unobstructed view in every direction, unimpeded by ballast tanks, batteries and other components.

Luxurious and spacious interior

With the C-Researcher series, we have aspired to create the ultimate in luxury interior design. When onboard a C-Researcher, guests enjoy exhilarating views from a sumptuous chair in a comfortable air-conditioned environment with variable airflow, adjustable from each seat. You can also enjoy music from a hi-fidelity Bluetooth sound-system and even chill your favourite drinks in a cold-storage box.

Large access hatch

You embark the submarine through its top-hatch. This is a large opening on the top that allows for comfortable entry into the interior of the submersible.

Sonar

This compact ultra-wide (130-degree) field-of-view instrument has a range of 100 meters, which acts as a second set of eyes when navigating the subsea terrain.

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Maximal manoeuvrability and speed

The C-Researchers utilise U-Boat Worx’ latest Pressure-Tolerant Lithium-ion Battery System. This new battery technology offers up to 100% more capacity than traditional private submarines. A total capacity of 62 kWh allows the C-Researcher series to extend mission time and minimize operational limitations. Abundant power has made it possible to apply more and stronger thrusters on our C-Researchers. Speed both on the surface and underwater are important to keep the sub on course and in position. Another advantage is that greater depths can be reached in record time. The C-Researcher series is without peer.

Underwater communication

While diving, the pilot is in continuous contact with the surface. The integrated acoustic underwater telephone is an important safety feature as it allows for wireless two-way communication.

Uncompromised surface capabilities

The C-Researcher is highly stable and manoeuvrable at the surface. These are very important characteristics for easy boarding of the sub. With a C-Researcher submersible you will not get wet feet during when transferring to the submarine. Ergonomic and strategically placed handrails, grips and steps help young and old to embark and disembark safely and comfortably.

Large access hatch

You embark the submarine through its top-hatch. This is a large opening on the top that allows for comfortable entry into the interior of the submersible.

Single lifting point

The single lifting point makes launch and recovery quick and easy. By only having to attach it at one point – to the crane – you create a safer environment. With the quick-release and efficient-connect lifting gear, you can be quickly in and out of the water. If desired, its man-riding certification supports lifting operations to take place with people inside.

Maximal manoeuvrability and speed

The C-Researchers utilise U-Boat Worx’ latest Pressure-Tolerant Lithium-ion Battery System. This new battery technology offers up to 100% more capacity than traditional private submarines. A total capacity of 62 kWh allows the C-Researcher series to extend mission time and minimize operational limitations. Abundant power has made it possible to apply more and stronger thrusters on our C-Researchers. Speed both on the surface and underwater are important to keep the sub on course and in position. Another advantage is that greater depths can be reached in record time. The C-Researcher series is without peer.

Underwater communication

While diving, the pilot is in continuous contact with the surface. The integrated acoustic underwater telephone is an important safety feature as it allows for wireless two-way communication.

Uncompromised surface capabilities

The C-Researcher is highly stable and manoeuvrable at the surface. These are very important characteristics for easy boarding of the sub. With a C-Researcher submersible you will not get wet feet during when transferring to the submarine. Ergonomic and strategically placed handrails, grips and steps help young and old to embark and disembark safely and comfortably.

Large access hatch

You embark the submarine through its top-hatch. This is a large opening on the top that allows for comfortable entry into the interior of the submersible.

Single lifting point

The single lifting point makes launch and recovery quick and easy. By only having to attach it at one point – to the crane – you create a safer environment. With the quick-release and efficient-connect lifting gear, you can be quickly in and out of the water. If desired, its man-riding certification supports lifting operations to take place with people inside.

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MAXIMUM MANOEUVRABILITY AND SPEED

The C-Researchers utilise U-Boat Worx’ latest Pressure-Tolerant Lithium-ion battery system. This new battery technology offers up to 100% more capacity than traditional private submarines. A total capacity of 62 kWh allows the C-Researcher series to extend mission time and minimize operational limitations. Abundant power has made it possible to apply more and stronger thrusters on our C-Researchers. Speed both on the surface and underwater are important to keep the sub on course and in position. Another advantage is that greater depths can be reached in record time. The C-Researcher series is without peer.

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UNIMPEDED VIEW

To experience the underwater world in the optimal way, one of U-Boat Worx’ design priorities has always been the clearest view. To ensure this, our remarkably clear fully acrylic pressure hull has been positioned at the front of the submersible, providing an unobstructed view in every direction, unimpeded by ballast tanks, batteries and other components.

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EVER-READY

Some may believe that getting a submersible ready to dive is a time-consuming operation. However, Owners of U-Boat Worx submersibles know that their submarines are simple, efficient and easy to launch and recover. Pre-dive preparations are swiftly executed by our effective design, state-of-the-art software and smart checklists that ensure your submersible is ready to dive whenever you are.

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UNCOMPROMISED SURFACE CAPABILITIES

The C-Researcher is highly stable yet deftly manoeuvrable on the surface. These are very important characteristics for easy boarding of the sub. Nobody gets wet feet while embarking or disembarking the C-Researchers! Ergonomic and strategically placed handrails, grips and steps help explorers young and old to board safely and comfortably.

remote controller with two joysticks for the nexus submersible

EFFORTLESS CONTROL

Each U-Boat Worx submersible is delivered with a world-class pilot training course. The intuitive interface of our submersibles is easy for pilots to learn. Unique to the U-Boat Worx private submarines is passengers being able to navigate the submersible while under supervision of the pilot. The unique control device – the MANTA Controller – can simply be handed over by the pilot to his guests for a once-in-a-lifetime opportunity to personally steer a submarine.

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CAREFREE LAUNCH & RECOVERY

When designing each model, U-Boat Worx factors in a variety of specific solutions to ensure safe and effortless launch and recovery from any type of support vessel. The C-Researcher is no exception. Its single lifting point allows for safe and quick launch and recovery. Man-riding certification is standard to support lifting operations to take place with people inside the submersible, if desired.

Another unique feature of each U-Boat Worx submersible is the MARLIN Controller. This wireless remote control allows the operator or pilot to steer the submarine while it is on the surface – effortlessly guiding the sub away from, or back to, the support vessel.

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Low height models

The C-Researcher series feature two special low height models designed to easily fit aboard most super yachts. The C-Researcher 3 LH – 500 has an impressive height of 185 cm and is capable of diving to depths of 500 meters, while the C-Researcher 3 LH – 1700 is only 230 cm tall and can travel to depths of 1700 meters. Both subs can carry 2 passengers and 1 pilot and can stay submerged for up to 16 hours.

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Red Dot Design Award

“C-Researcher 3” submersible has won a Red Dot Product Design Award.

The international design competition – the “Red Dot Design Award” – is aimed at those who wish to distinguish their business activities through design. Outstanding design is selected by competent expert juries in the areas of product design, communication design, and design concepts.

“Winning a Red Dot Product Design Award for the second consecutive year in a row is a crowning achievement for our company,” said Bert Houtman, Founder and Chairman of U-Boat Worx. “It reinforces to our clients that our products are world class.”

360°

C-Researcher

Specifications & Features

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Occupants
Depth
2
500m
1140m
3000m
3
300m
1140m
2500m
3 low height
500m
1700m
5
300m
Specifications
  • Depth
    500 m · 1,640 ft
  • Occupancy
    1 passenger · 1 pilot
  • Weight
    5,750 kg
  • Endurance
    18 hours
  • Length
    319 cm
  • Width
    280 cm
  • Height
    214 cm
  • Battery
    62 kWh
  • Propulsion
    4 X 5.5 kW
    2 X 6.4 kW
  • Speed
    3 knots
  • Depth
    1,140 m · 3,740 ft
  • Occupancy
    1 passenger · 1 pilot
  • Weight
    7,200 kg
  • Endurance
    18 hours
  • Length
    381 cm
  • Width
    336 cm
  • Height
    250 cm
  • Battery
    62 kWh
  • Propulsion
    4 X 5.5 kW
    2 X 6.4 kW
  • Speed
    3 knots
  • Depth
    3,000 m · 9,840 ft
  • Occupancy
    1 passenger · 1 pilot
  • Weight
    9,960 kg
  • Endurance
    18 hours
  • Length
    381 cm
  • Width
    336 cm
  • Height
    250 cm
  • Battery
    62 kWh
  • Propulsion
    4 X 5.5 kW
    2 X 6.4 kW
  • Speed
    3 knots
  • Depth
    300 m · 1,000 ft
  • Occupancy
    2 passengers · 1 pilot
  • Weight
    6,300 kg
  • Endurance
    18 hours
  • Length
    352 cm
  • Width
    312 cm
  • Height
    234 cm
  • Battery
    62 kWh
  • Propulsion
    4 X 5.5 kW
    2 X 6.4 kW
  • Speed
    3 knots
  • Depth
    1,140 m · 3,740 ft
  • Occupancy
    2 passengers · 1 pilot
  • Weight
    8,900 kg
  • Endurance
    18 hours
  • Length
    390 cm
  • Width
    346 cm
  • Height
    255 cm
  • Battery
    62 kWh
  • Propulsion
    4 X 5.5 kW
    2 X 6.4 kW
  • Speed
    3 knots
  • Depth
    2,500 m · 8,200 ft
  • Occupancy
    2 passengers · 1 pilot
  • Weight
    11,300 kg
  • Endurance
    18 hours
  • Length
    425 cm
  • Width
    360 cm
  • Height
    270 cm
  • Battery
    62 kWh
  • Propulsion
    4 X 5.5 kW
    2 X 6.4 kW
  • Speed
    3 knots
  • Depth
    500 m · 1,640 ft
  • Occupancy
    2 passengers · 1 pilot
  • Weight
    4,100 kg
  • Endurance
    18 hours
  • Length
    313 cm
  • Width
    285 cm
  • Height
    low height185 cm
  • Battery
    62 kWh
  • Propulsion
    4 X 5.5 kW
    2 X 6.4 kW
  • Speed
    3 knots
  • Depth
    1,700 m · 5,570 ft
  • Occupancy
    2 passengers · 1 pilot
  • Weight
    10,500 kg
  • Endurance
    18 hours
  • Length
    400 cm
  • Width
    346 cm
  • Height
    low height230 cm
  • Battery
    62 kWh
  • Propulsion
    4 X 5.5 kW
    2 X 6.4 kW
  • Speed
    3 knots
  • Depth
    300 m · 1,000 ft
  • Occupancy
    4 passengers · 1 pilot
  • Weight
    8,600 kg
  • Endurance
    18 hours
  • Length
    400 cm
  • Width
    346 cm
  • Height
    230 cm
  • Battery
    62 kWh
  • Propulsion
    4 X 5.5 kW
    2 X 6.4 kW
  • Speed
    3 knots
Features
  • Battery System
  • MANTA Controller
  • MARLIN Controller
  • Auto-depth
  • Auto-heading
  • UIS
  • Single lifting point
  • Man-rated lifting
  • Automatic trim weight system
  • Omni-directional operation

Pressure-Tolerant Battery System

The Pressure-Tolerant Battery System houses the batteries and electronics in oil-filled pressurised enclosures. The use of pressure-resistant components reduces the size and weight of the submersible, particularly on the deep-diving models.

MANTA Controller

The MANTA Controller allows for pinpoint precision manoeuvring. The intuitive controls permit for supervised passenger steering, offering passengers an even more exciting dive experience. The controller also provides quick access to intelligent pilot assistance features such as Auto-heading and Auto-depth.

MARLIN Controller

Initially developed to make launch and recovery effortless and safe, the MARLIN Controller is a wireless remote that can navigate the submarine on the surface. Once the submarine is in the water, the controller can be used to steer it away from the support vessel without a pilot inside. The MARLIN Controller can also be used to keep the submarine in position above a dive site, while the pilot assists with passenger embarkation.

Auto-depth

With Auto-depth engaged, the submersible will hold steady at its current depth. When applying vertical thrust, the function will automatically disengage and seamlessly respond to the pilot’s commands. This function forms part of the intelligent pilot assistance features.

Auto-heading

When Auto-heading is activated, the submersible will automatically hold its current heading, whether following a course or facing an object of interest. This function forms part of the intelligent pilot assistance features.

UIS

The U-Boat Worx Information System (UIS) gives the pilot direct access to all relevant information on a clear touchscreen display. This PLC-based network of sensors ensures the right information is provided at the right time. The UIS makes diving effortless.

Single lifting point

The single lifting point makes launch and recovery quick and easy. By only having to attach it at one point – to the crane – you create a safer environment. With the quick-release and efficient-connect lifting gear, you can be quickly in and out of the water. If desired, its man-riding certification supports lifting operations to take place with people inside.

Man-rated lifting

The C-Researchers are delivered with a man-rated lifting certification as standard, which permits manned launch and recovery if the circumstances require.

Automatic trim weight system

The C-Researchers are characterised by their abundant payload. This payload can be used for carrying many optional extras or collecting underwater objects. The automatic trim weight system maintains the horizontal trim of the submersible when gathering heavy samples.

Omni-directional operation

Apart from the basic forward, reverse, up and down movements, the submersible can also move laterally. Lateral movement greatly optimises object approach, view, and dive efficiency.

Safety
  • Maximum depth protection (MDP)
  • Deadman's Switch (DMS)
  • Safety Buoy
  • USBL
  • DNV Certification
  • Drop weight
  • Life support

Maximum depth protection (MDP)

The MDP feature prevents the pilot from diving deeper than the submarine’s maximum operating depth. In case the submersible should ever find itself too deep, this safety feature will automatically raise the sub until it is once again within its certified depth.

Deadman's Switch (DMS)

This DMS safety system will automatically resurface the submersible in the unlikely event that the pilot becomes incapable of controlling it. The pilot needs to acknowledge the DMS every 10 minutes, otherwise it will initiate the ascent procedure.

Safety Buoy

The Safety Buoy is characteristic for U-Boat Worx submersibles. When released it marks the position of the submarine on the surface. The safety buoy of the deep-diving C-Researcher models also sends a signal to the mother ship. The Dyneema Rope that connects the buoy with the submersible measures 1.5 times the operating depth of the submersible.

USBL

A very advanced USBL system is available that relays GPS data to the submersible’s on-board computer via integrated underwater modems.

Piloting with real time positioning and supporting text data provides for accurate and efficient navigation.

The DVL (Doppler Velocity Log) delivers real-time ground speed and position data linking to the on-board computer system.

DNV Certification

Certification by the world-leading classification society, DNV, requires each individual submersible to meet stringent and extensive rules and regulations, as well as pass a range of rigorous test and trials from design to final delivery. Overseen by independent surveyors, this is an independent verification of the safety of every U-Boat Worx submersible.

Drop weight

This large lead weight can be manually released from within the submersible to increase the buoyancy of the submarine and assist its return to the surface in case of an emergency.

96 HOURS LIFE SUPPORT

Each submarine is equipped with a minimum of 96 hours of life support. Regardless of whether it is a 3-person or a 11-person submarine, all occupants have 96 hours of life support available. This additional life support is mandatory according to the rules of DNV. It can be used in the unlikely event the submersible needs to remain underwater longer than the regular mission time. The 96 hours of life support includes oxygen supply and CO2 scrubbers to filter the air, but also emergency battery power for life support monitoring, communication with the surface, light, food and water.

Continue your journey

  • C-Researcher series

    C-Researcher Series
    • C-Researcher 2
      500 M 1,640 Ft
      5,750 KG 12,700 Lb
      2
    • C-Researcher 2
      1,140 M 3,740 Ft
      7,200 KG 15,800 Lb
      2
    • C-Researcher 2
      3,000 M 9,840 Ft
      9,960 KG 21,950 Lb
      2
    • C-Researcher 3
      300 M 1,000 Ft
      6,300 KG 13,900 Lb
      3
    • C-Researcher 3
      1,140 M 3,740 Ft
      8,900 KG 19,620 Lb
      3
    • C-Researcher 3
      2,500 M 8,200 Ft
      11,300 KG 24,910 Lb
      3
    • C-Researcher 3 LH
      500 M 1,640 Ft
      4,100 KG 9,040 Lb
      3
    • C-Researcher 3 LH
      1,700 M 5,570 Ft
      10,500 KG 23,150 Lb
      3
    • C-Researcher 5
      300 M 1,000 Ft
      8,600 KG 18,960 Lb
      5
    Learn about the C-Researcher series
  • NEXUS Series

    NEXUS Series
    • NEXUS 7
      200 M 650 Ft
      11,000 KG 24,000 Lb
      7
    • NEXUS 8
      200 M 650 Ft
      12,000 KG 26,000 Lb
      9
    Learn about the NEXUS Series
  • Nautilus

    Nautilus
    • 17 occupants
      200 M 650 Ft
      17
    Learn about the Nautilus
  • Cruise Sub series

    Cruise Sub Series
    • Cruise Sub 5
      500 M 1,640 Ft
      8,500 KG 18,750 Lb
      5
    • Cruise Sub 5
      1,140 M 3,750 Ft
      11,000 KG 24,250 Lb
      5
    • Cruise Sub 5
      1,700 M 5,570 Ft
      16,000 KG 35,260 Lb
      5
    • Cruise Sub 7
      300 M 1,000 Ft
      9,500 KG 20,940 Lb
      7
    • Cruise Sub 7
      1,140 M 3,740 Ft
      14,500 KG 31,970 Lb
      7
    • Cruise Sub 9
      300 M 1,000 Ft
      11,000 KG 24,250 Lb
      9
    • Cruise Sub 11
      200 M 650 Ft
      13,300 KG 29,320 Lb
      11
    Learn about the Cruise Sub series
  • Super Yacht Sub

    Super Yacht Sub 3
    • Super Yacht Sub 3
      300 M 1,000 Ft
      3,800 KG 8,380 Lb
      3
    Learn about the Super Yacht Sub
  • C-Explorer series

    C-Explorer Series
    • C-Explorer 3
      300 M 1,000 Ft
      6,010 KG 13,250 Lb
      3
    • C-Explorer 5
      200 M 650 Ft
      7,340 KG 16,180 Lb
      5
    Learn about the C-Explorer series
  • NEMO series

    NEMO
    • NEMO 2
      100 M 330 Ft
      2,500 KG 5,510 Lb
      2
    • NEMO 1
      100 M 330 Ft
      2,000 KG 4,400 Lb
      1
    Learn about the NEMO series
  • Super Sub

    Super Sub
    • Super Sub
      300 M 1,000 Ft
      9,000 KG 19,800 Lb
      3
    Learn about the Super Sub
  • UWEP

    UWEP
    • 80 OCCUPANTS
      200 M 650 Ft
      80
    • 120 OCCUPANTS
      200 M 650 Ft
      120
    Learn about the UWEP
Model Overview
feet/poundsmeter/kilogram
  • Occupants (min.)

    2
    99
  • Depth (min.)

    100
    3000
    328
    9840
  • Weight (max.)

    2480
    1300000
    5465
    2500000
  • Height (max.)

    150
    1000
    60
    1000