California instruments joins AMETEK as part of its Electronic instruments Group (EIG) — a provider in advanced monitoring, testing, calibrating, and display instruments.

Gadgets carried on all vessels send electronic signals to make satellite monitoring possible at all times, and each boat is likely to go to sea with an inspector aboard twice a year.

Unusually high levels of solar activity distorting magnetic fields and even signals from Menwith Hill spy base, near Harrogate, an electronic monitoring station, have also been blamed.