MODFOX M4
– Wireless Subsea Control

Autonomous. 

Umbilical-Free.

In response to increasing industry demand and the push for next-generation subsea solutions, MODFOX M4 introduces a revolutionary wireless, self-sustained subsea control system powered by battery technology.

By integrating wireless communication and subsea battery technology with the MODFOX M3 platform, MODFOX M4 eliminates the need for hardwired umbilicals or ROV tethering.

Advanced Subsea Operations Without Cables

Utilizing a combination of acoustic and optical infrastructure, the fully autonomous system enhances safety, reduces operational risk, and significantly lowers time and cost for intervention and well access operations.

The Technical Data 

  • Qualified operating depth 3000m
  • Control Fluid type Oceanic HW443, Transaqua and similar
  • Modular subsea battery package – 50 kWh or 100 kWh
  • Separate LP Pump and HP Pump circuits
  • Control Pressure LP 345 bar / 5000 psi
  • Control Pressure HP 690 bar / 10000 psi
  • Control Pressure UHP 1378 bar / 20000 psi
  • Pressure and return filters
  • Internal fluid reservoirs
  • Flowmeter on pressure and return functions
  • Dual pressure transducers for redundancy of pumps and valve packs
  • Subsea Gateway Control System
  • Integration of third part XT SCM Control Canisters
  • Topside Control System (HMI)
  • ROV Hydraulic Flying Leads – Valve Stab connectors
  • ROV Electric Flying Leads – Wet-mate connectors

Why MODFOX M4?

  • Fully wireless, battery-powered subsea control system
  • Eliminates the need for umbilicals or ROV tethering, simplifying deployment
  • Utilizes acoustic and optical communication infrastructure for enhanced autonomy
  • Reduces operational risk, vessel time, and offshore cost
  • Ideal for intervention and well access operations where flexibility and speed matter
  • Supports low-emission operations and contributes to a smaller environmental footprint

Want to talk more about our operations?

Don’t hesitate to contact Ørjan Nyberg Ladsten

Ørjan Nyberg Ladsten

Customer Success Manager

+47 928 98 599
onl@foxsubsea.no

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