Archive record
Summary
Based on the interval and directional data suggested by SIG-0023, Signal Analysis projected a fourth fragment would most likely surface at the northern post within the array's first quarter of operation. It has not. The post has recorded no anomalies of any kind in that window, which Pattern Analysis flags as itself unusual for that location.
Cross-Department Note
Pattern Analysis, which maintains the Silent Ocean arc for exactly this kind of statistically improbable quiet, has asked to be looped into Black Signal review. This is the first formal point of contact between the two arcs.