4–8 contributors
SAAF — aquatic floatables
Waste entering the ocean is almost never measured. Clean-ups get planned on impressions — a photograph, a volunteer's estimate, a small area counted by hand and extrapolated to a coastline — and without a baseline nobody can say whether the problem is growing or shrinking, or whether last year's effort did anything. Drone imagery and detection models are now cheap enough that a survey needs a consumer 4K drone rather than a research budget, which is what makes a repeatable count possible at all. This is also the clearest test of the whole IIDA argument — a problem too long for a startup to fund, too applied for a university to prioritise, and worth a great deal to whoever measures it first.
Kill criteria. If the strict score stays where it is and mass estimates cannot be stated with honest error bars, this stops being measurement and becomes a counting exercise with a decimal point, and it closes. It also closes if surveys are flown but nobody — municipality, NGO or donor — changes a decision because of one. A number nobody acts on is not an outcome.