The Rasnik 3-point alignment system, widely applied in particle physics experiments and in the instrumentation of gravitational wave experiments, can be used as N-point alignment system by'leap frog' N individual 3-point systems. The conceptual implementation of Rasnik chains in C3 is presented. Then, the proper operation of a laser diode and a CMOS image sensor in liquid nitrogen has been verified. Finally, next plans for testing a small but complete system, immersed in liquid nitrogen, are presented.@en