CPA_ais-211821210|ais-244030641The two ships will approach within ~8 min to a distance of only ~60 m: “PORTLAND” (6 kn) ↔ “TRAMP” (6 kn). In reciprocal/intersecting travel, such a close approach is a sign of collision risk. It is an automatic CPA calculation — not a confirmed event, but an early signal. 📋 EVIDENCE (AIS · aisstream): “PORTLAND” MMSI 211821210 @ 53.2470,6.5428 · 6 kn · route 297° | “TRAMP” MMSI 244030641 @ 53.2581,6.5051 · 6 kn · route 113° | Measurement: 2026-09-23 17:57:18 UTC
Fast forward to the AIS position, speed and heading of the two ships; If the closest passage distance (CPA) will fall below 0.5 nautical miles, a warning will be generated.
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