ICEBERG closure matrix
Each of the 48 cells shows the best delivered water, in tonnes, for one audit-sweep setting. Each facet fixes vehicle and chunk mass and varies capture multiplier and thruster specific impulse. Amber-ringed cells clear the chosen floor. Hover a cell for its margin. The write-up has the analysis. The sweep can be regenerated from the public repo.
Red misses the floor, neutral meets it, and blue clears it. "--" means no feasible path. No 100-tonne-vehicle cell closes; the bigger ship never pays for itself. Every closing cell at the commercial floors needs a capture multiplier of at least 0.75 and a specific impulse of at least 700 s. Neither value has been flight-demonstrated. Data: audit sweep 20260522T175555Z, corrected anchors.