Chesapeake Bay Entrance: traffic drop — -48% vs 87-day median

Chesapeake Bay Entrance traffic has dropped sharply to 16 transits in the past 24 hours, representing a 48 percent decline from the 87-day median of 31 transits, per ChartNav's monitor. This marks a continuation of an anomaly that began on July 25, with several alerts tracking swings between -66 and +62 percent since late September. Normal daily variation in this zone runs approximately six transits. AIS coverage stands at 0.98, providing reliable data. The cause remains unknown; this reflects a traffic pattern shift detected through ChartNav's automated monitoring rather than reported operational disruptions. Actual vessel movements visible on the live map and manifest may provide additional context.