There are three prime requirements for vessel signature management:
- Vessel design for low signature vessel (stealth)
- Signature optimisation
- Threat assessment and prediction
A vessel may be designed by its construction and countermeasures such as Onboard Degaussing with regards to stealth.
Once built, the influence signature for every vessel will be different. This signature will change gradually over time depending on the vessel’s usage and transits made.
Vessels with significant magnetic material component can also be subject to magnetic deperming treatment to control the signature through life.
In order to maintain a vessel’s signature within required levels at the threat depth, a knowledge of that vessel signature is required. This signature may be measured directly using a shallow multi-influence range or deep water range or alternatively inferred from knowledge of magnetic fields and electric hull potentials at or close to the vessel itself. ROV and AUV vehicles can be measured in a dedicated land range facility. The use of a modelling process enables signatures to be predicted at other locations and to calculate the threat worldwide.
Further information can be seen below.