~/challenges $ cat weekly/05_ghost_in_the_ballast.md
Data Analysis
Difficulty: Medium
Live · Week 05
CHALLENGE #05 · Released 5 May 2026
Ghost in the Ballast
REWARD +250 ptsBriefing
intel://sss/briefing_05.txt
INTELBergen, 11:14 local. The MV Saltstrøm, a Vestmar Shipping AS chemical tanker, is heeling across the Skagerrak. The bridge data says it isn’t. Pumps nominal. Valves nominal. No alarm. A manual sounding finds Tank B visibly lower than the automation reports.
Vestmar has forwarded the ballast telemetry to the Security Special Services Team. Every reading within tolerance. Every reading lying.
This carries Solstice Prime’s signature. Operator, can you find what they hid?
Objective
Something is hiding in the
Tank B readings — find it and submit your flag.
Evidence
Capture the Flag
Submit your solution · +250 pts on success
Format:
GRID-2026-XXXXOne submission per solve. Points post to the leaderboard on verify.