This work treats some problems related to guidance of surface-to-air missiles (SAMs) using target data from a network of sensors. We study the effects of limited network data rate and processing speed (time delays) as well as errors in the measurements. The study is carried out in the form of a number of simulations of different missile-target engagement scenarios using a simplified but realistic model of a SAM. Different types target paths are studied; low altitude constant velocity straight course and single high-g turn course. In all cases we study in particular the effect of using an (ideal) internal on-board target seeker during the final parts of the pursuit in order to determine values for a suitable hand-over range for switching from network based measurements to internal seeker based ditto.