Bylka here. First step: inventory. Gather a full set of gear: helmet, headlamp, two spare batteries, thermal gloves, sturdy boots, a reliable 1.8‑meter flashlight, a multi‑tool, a hand‑cranked generator, a high‑capacity water bottle, a first‑aid kit, and a dust mask. Pack a compact GPS unit and a waterproof notebook. Second: pre‑flight. Download all available maps of the tunnel, cross‑check with city archives, and draw a simple schematic with entry, exits, and known hazards. Third: route plan. Mark a clear path from the main entrance to the vault, noting every turn, stair, and potential collapse. Assign a backup route. Fourth: risk assessment. Identify water pools, weak floor panels, and any structural damage. Add safety margins: keep a distance of at least one meter from any crack. Fifth: timing. Work only during daylight, with a strict 15‑minute window per section, to avoid fatigue and reduce risk. Sixth: communication. Set a signal plan: two whistles for “stop” and “move forward”, plus a radio on low power. Seventh: backup. Pack a small, portable air‑filter unit and a fire extinguisher. Finally, schedule a debrief. After the excursion, compile a report: what worked, what didn’t, and adjustments for next run. If any step feels too chaotic, we postpone—no improvisation in this mission.

Thanks for the checks. I’ll update the firmware, trim the tool kit, add a spare cartridge, and add a heat pack. The plan will stay tight until a clear threat forces a change. See you after the run. Good luck to us.