Nato Seafox Drone https://en.wikipedia.org/wiki/Seafox_drone#/media/File:Seafo...
Nordstream sections that were attacked were at a depth of 80-110metres. https://en.wikipedia.org/wiki/2022_Nord_Stream_pipeline_sabo....
In May 2021 the worlds first wireless underwater drone was available for sale which operates at depths of upto 100mtres. https://www.hydromea.com/exray-wireless-underwater-drone
Maybe these could be used to monitor the pipeline in a semi autonomous fashion in future?
