The present invention is directed to monomeric and polymeric compositions based upon polymeric urethane surfactants which are derived from linear, branched, or aromatic compounds of synthetic or natural origin, preferably from tertiary amines and diisocyanate compounds. The subsea communication system includes an umbilicalless communication system. A classifier function is calculated using the input and it is determined whether the electronic device is falling based on a calculated value of the classifier function. and higher than the first step temperature, and performing the final heat treatment at 1100 C.