Methods, apparatus and systems including a computer comprising at least one hardware processor, at least one tangible storage medium, and at least one inputoutput interface for evaluating a quality of a locate andor marking operation. 01 to 5% by weight, based on perfluoropolymer, of a high-molecular-weight perfluorinated polymer with a melting point at least 20 C. When the neighboring ALU is the last or end ALU in the set, the shifting logic continues to shift the input data for the end ALU that is not defective, to the redundant parallel ALU. The fluid is preferably a mineral oil.