Underwater Ethernet Cables - browse Dive And See products and choose the right underwater system, cable, connector, or accessory for your application.
Dive And See builds professional underwater and subsea Ethernet cable assemblies for connecting submerged cameras, sensors, housings, and marine equipment to surface or underwater systems. Custom cable lengths and connector configurations are available for applications up to 100 m / 328 ft.
Choose Your Underwater Ethernet Connection
Dive And See provides complete underwater Ethernet cable assemblies rather than only raw network cable. Systems can be configured for underwater-to-surface communication, underwater-to-underwater connections, or integration through an Ethernet bulkhead connector or penetrator.
| Underwater → Surface | Waterproof underwater connector and marine Ethernet cable terminating at the surface for connection to an RJ45 network device, PoE injector, switch, computer, recorder, or control system. |
| Underwater → Underwater | Waterproof Ethernet connectors on both ends for communication between two submerged devices, housings, sensors, cameras, or subsea enclosures. |
| Bulkhead Integration | Ethernet bulkhead connectors and penetrator-style configurations for routing network communication through underwater housings and pressure enclosures. |
| Custom Assembly | Custom cable length, connector configuration, bulkhead thread, internal pigtail, and termination for engineering, OEM, and prototype applications. |
Underwater & Subsea Ethernet Cable Assemblies
DNC-1020 - Underwater-to-Surface Cat6 Ethernet Cable, 100 ft
A professional Cat6 underwater Ethernet cable assembly for connecting submerged equipment to a surface network. Suitable for underwater cameras, sensors, inspection equipment, research systems, and PoE-compatible devices.
DNC-1044 - Underwater-to-Surface Cat6 Ethernet Cable, 300 ft
Long-distance Cat6 Ethernet assembly for underwater-to-surface communication over approximately 90 m / 300 ft. Designed for applications requiring Gigabit Ethernet and compatible PoE configurations.
DNC-1101 - Underwater-to-Underwater Cat6 Ethernet Cable
A subsea Ethernet cable assembly with waterproof connectors on both ends for direct connection between two underwater devices. Custom cable lengths are available for prototype, OEM, marine research, monitoring, and equipment integration projects.
DNC-1102 - Short Underwater Cat6 Ethernet Patch Cable
Compact underwater-to-underwater Ethernet patch cable for short equipment-to-equipment connections, testing, integration, and custom subsea electronics.
DNC-1148 - High-Speed Shielded Underwater Ethernet Cable
Shielded high-performance underwater Ethernet cable for applications where signal integrity and resistance to electrical interference are important. Available for professional marine, camera, monitoring, and custom network systems.
Custom Subsea Ethernet Cable Assemblies
Many underwater projects require more than a standard cable length. Dive And See builds custom subsea Ethernet cable assemblies for engineers, equipment manufacturers, prototype developers, research organizations, marine technology companies, and professional underwater system integrators.
Custom options may include:
- Custom cable lengths up to 100 m / 328 ft
- Underwater-to-surface configurations
- Underwater-to-underwater configurations
- Waterproof connector on one or both ends
- RJ45 surface termination
- Custom internal pigtail length
- Custom connector and bulkhead combinations
- M16, M24, 7/16-20, and other mounting interfaces
- Short-thread and extended-thread bulkhead versions
- Straight and 90-degree / swivel configurations
- Prototype quantities
- Production quantities
Tell us what you need to connect, the required cable length, housing thread, termination, and quantity. We can recommend or build the complete underwater Ethernet connection.
From Prototype to Production
Dive And See works with engineering customers who may initially require only one or two custom underwater Ethernet assemblies for prototype testing. If the design is successful, the same configuration can be reproduced in additional quantities or modified for different cable lengths, threads, pigtails, or equipment revisions.
Prototype quantities are welcome. Custom underwater connectivity does not have to require long production lead times.
Production Lead Time
Standard Assembly: Typically 6–8 business days.
Expedited 3-Day Assembly: Available for many Ethernet cable and connector configurations for an additional 15% expedited assembly fee.
Please contact Dive And See before ordering to confirm expedited production availability.
Underwater Ethernet Bulkhead Connectors & Penetrators
An underwater Ethernet bulkhead connector provides a detachable waterproof network connection through the wall of a camera housing, pressure vessel, marine enclosure, or underwater instrument.
A penetrator configuration provides a different type of cable entry where a cable passes through the enclosure rather than using a detachable external mating connection. Dive And See offers both approaches depending on system requirements.
Common Ethernet Bulkhead Configurations
| M16 Short Thread | DNC-2071 - compact mounting configuration for thinner housing walls. |
| M16 Extended Thread | DNC-2025 - extended mounting thread for thicker enclosure walls or applications requiring additional thread engagement. |
| M16 90° / Swivel | DNC-2084 and DNC-2084-L - side-exit cable configurations where installation clearance is limited. |
| 7/16-20 | DNC-2082 and related configurations for housings using a 7/16-20 mounting port. |
| M24 & Custom | M24 and custom mounting configurations are available for specialized housings and OEM equipment. |
Underwater Ethernet and Power over Ethernet (PoE)
Selected Dive And See underwater Ethernet cable assemblies can be used in compatible PoE, PoE+, and PoE++ systems, allowing Ethernet data and electrical power to travel through the same network conductors.
This can simplify installation for underwater IP cameras, sensors, monitoring equipment, and network-controlled electronics by reducing the number of separate cables required between the underwater device and surface equipment.
Actual PoE performance depends on cable length, conductor size, device power requirements, network equipment, voltage drop, and the specifications of the complete system.
Ethernet + Dedicated Power Conductors
Some underwater devices require Ethernet communication plus separate DC power rather than standard PoE. Dive And See also provides cable and bulkhead connector configurations that combine Ethernet conductors with dedicated power wires.
These configurations are useful for cameras, lighting systems, sensors, control electronics, and custom underwater equipment requiring voltage or current that cannot be supplied through the Ethernet pairs alone.
Typical Direct Underwater Ethernet System
Surface laptop, NVR, control station, network switch, or PoE injector → underwater Ethernet cable assembly → waterproof bulkhead connector → underwater IP camera, sensor, controller, or marine electronics.
This architecture provides a direct network connection between underwater equipment and surface infrastructure without requiring an intermediate underwater computer or communication system.
Applications
- Underwater IP camera systems
- Direct-to-surface underwater monitoring
- Boat and hull inspection equipment
- Marine research instruments
- Aquarium monitoring systems
- Underwater sensors and data acquisition
- Subsea enclosures and pressure vessels
- OEM underwater equipment
- Prototype marine electronics
- Industrial underwater inspection
- Remote monitoring and live streaming
- ROV and marine robotic systems
Why Choose Dive And See for Underwater Ethernet Connectivity?
- Complete underwater Ethernet cable assemblies
- Underwater-to-surface and underwater-to-underwater configurations
- Cat6 and high-speed shielded Ethernet options
- Gigabit Ethernet support on selected models
- PoE / PoE+ / PoE++ compatible configurations
- Custom lengths up to 100 m / 328 ft
- Multiple underwater bulkhead thread options
- Custom pigtail and termination options
- Prototype quantities welcome
- Production quantities available
- Fast assembly compared with many traditional custom subsea cable programs
- Professional engineering support for system integration
How to Specify a Custom Underwater Ethernet Assembly
For the fastest recommendation or quotation, provide the following information:
- Connection: underwater-to-surface or underwater-to-underwater
- Cable length: required length up to 100 m
- Ethernet requirement: Cat6, high-speed shielded Ethernet, or other specified network requirement
- Power: Ethernet only, PoE-compatible, or Ethernet plus dedicated power conductors
- Housing port: M16, M24, 7/16-20, or custom thread
- Bulkhead style: straight, extended thread, 90-degree, swivel, or penetrator
- Internal termination: RJ45, pigtail, or custom termination
- Quantity: prototype or production quantity
- Required delivery date: standard or expedited assembly
Frequently Asked Questions
What is a subsea Ethernet cable assembly?
A subsea Ethernet cable assembly is a finished waterproof network cable with appropriate underwater connectors and terminations for connecting submerged equipment to surface equipment or to another underwater device.
Can these cables be used with underwater IP cameras?
Yes. Underwater Ethernet cable assemblies are commonly used to connect submerged IP cameras to surface PoE injectors, switches, NVRs, computers, and monitoring networks.
Can I connect two underwater devices directly?
Yes. Products such as DNC-1101 and DNC-1102 use waterproof connectors on both ends and are designed for underwater-to-underwater Ethernet connections.
Do these cables support Gigabit Ethernet?
Yes. Selected Dive And See Ethernet cable and connector configurations support Gigabit Ethernet up to 1 Gbps.
Can Ethernet carry both data and power underwater?
Yes, when the complete system is PoE-compatible. Selected Dive And See products support PoE, PoE+, and PoE++ system configurations. Separate dedicated power conductors are also available when required by the underwater equipment.
What is the maximum depth?
Dive And See standardizes this underwater Ethernet product family for applications up to 100 m / 328 ft. Always check the specifications of the complete cable, connector, housing, and connected equipment.
Are custom cable lengths available?
Yes. Custom underwater Ethernet cable lengths are available for many configurations up to 100 m / 328 ft.
Can I order only one custom cable for a prototype?
Yes. Prototype and small-quantity custom assemblies are welcome. Additional assemblies can later be produced in the same configuration or modified as your design evolves.
Can you make a custom bulkhead thread or pigtail length?
Custom bulkhead configurations, thread options, internal pigtail lengths, and terminations are available for many engineering and OEM projects. Contact Dive And See with your enclosure and integration requirements.
How fast can a custom Ethernet assembly be produced?
Standard assembly is typically 6–8 business days. Expedited 3-business-day assembly is available for many configurations for an additional 15% fee, subject to production availability.
Important Tightening Warning
Before submerging any underwater housing or cable assembly, verify that the coupling nut is fully tightened by hand. Do not use pliers. Improper tightening may cause flooding, signal loss, or equipment damage.
Need a Custom Underwater Ethernet Connection?
Tell us what you need to connect. Send us the required cable length, connector configuration, housing thread, internal termination, quantity, and required delivery date. Dive And See can build the complete underwater Ethernet cable and bulkhead connection for your application.