Ashtead FMD (flooded member detection)

New analogue acoustic FMD system, now available to rent/hire from Ashtead Technology.

The system comprises an ROV electronics pod, remote probe, topside interface unit and operating software. This user friendly system provides a real time A-Scan analogue display of the acoustic returns.

The analogue display enables the operator to correctly align the probe and ensure that the return signal is of maximum amplitude and clearly identify if the member is flooded.
The software allows recording of analogue trace and location event details to enable fast and efficient reporting during the project.

Key features

  • Acoustic Based System
  • ROV or diver operated
  • Analogue display
  • User friendly software
  • Recording capability
  • Robust reliable design


  • Subsea structure inspection by ROV, or by diver, using the optional umbilical

Technical specifications

System Operating Frequency1 Mhz
System Operating Range30 to 1000cm
ROV Electronics - CommunicationsRS232, RS485 (38400 baud)
ROV Electronics - Power12-24Vdc , 3.6watts
ROV Electronics - Data/power connector RS485FCR 1508M
Probe - Cable Length3m
Topside Interface - Power110 - 240VAC / 5 watts


ROV Electronics160mm x 70mm6.3” x 2.8”2.1kg (in air) 1.5kg (in water)4.6lb
Probe160mm x 55mm6.3” x 2.2”0.75kg (in air) 0.5kg (in water)1.7lb 3.3lb
System Shipping520mm x 430mm x 210mm20.5” x 17” x 8.3”11kg24.3lb