Definition(s)
Residual Current
part of the total current that is not constituted from harmonic tidal components (i.e. the tidal stream)
NOTE Residual currents are caused by a variety of physical mechanisms and comprise a large range of natural frequencies and magnitudes in different parts of the world.
Source: API RP 2MET, Derivation of Metocean Design and Operating Conditions, First Edition, November 2014. Global Standards