Hindcast — CFS Alert, Part 2 (25 Mar – 30 Jun 2026)

Summary

Spring BOXTOP 26-1 flew in April with an RAF C-17 alongside the RCAF for the first time; open ADS-B catches RAF C-17s staging through Keflavík, with ZZ176 northwest-bound towards Pituffik on 10 Apr. Alert itself is still unheard, and clear passes show no aircraft on the ground. US government jets at Nuuk match envoy Landry's 17–20 May visit; Danish activity at Nuuk peaks 13 May – 4 Jun; the RCAF's effort goes west to RED FLAG-Alaska, not to Greenland.

Window 24 Mar 2026 18:00 MDT (00:00 UTC, 25 Mar) → 30 Jun 2026 17:59 MDT (23:59 UTC)

Plates

Plate A — weeklyPlate B — alert optical boxtopPlate C — alert radarPlate D1 — raf c 17s through keflav k for boxtop 26Plate D2 — usaf c 5m 87 0028 eastbound off west grePlate D3 — pituffik space base 15 apr boxtop 26 1 sPlate E1 — us government jets at nuuk around envoy Plate E2 — nuuk airport 17 may envoy s arrival dayPlate E3 — danish c 130j challenger surge at nuuk 1Plate E4 — dutch kdc 10 mrtt tankers off nuuk 3 aprPlate F1 — rcaf and raf transports at the yukon alaPlate F2 — cc 130j 130615 the january alert aircrafPlate F3 — yellowknife airport 30 mayPlate G1 — rcaf through keflav k 23 27 apr cc 330 3