This latest generation of PAL-AT systems automatically creates a new master map after a leak event is detected. This puts the system back on-line immediately to monitor the entire cable for leaks getting larger or new leaks.Comparing the current condition with a baseline map enables PAL-AT to monitor a system with minor installation inconsistencies and small amounts of wet cable. PAL-AT can accept initial field conditions that force other systems to reduce their sensitivity or be inoperative. It also enables the system to locate additional leaks occurring past previously detected leaks.