Airport and seaport tanks now stock for the traffic they actually see
Municipal fuel tanks used to refill toward 90% of their capacity whatever their traffic. They now hold one to two game days of the fuel their departures actually burn, plus one largest departure and their delivery lead, so towns stop sinking their budgets into fuel no flight will burn.
A tank's capacity was set by its blueprint, and the refill ladder bought toward 90% of it at every port, however quiet. Across the world that was 228 million litres restocked against 51 million burned in two weeks, and 1.6 billion of municipal money sitting in fuel with a median cover of 2,850 game days.
- Sized from departures. A tank now reorders when it holds less than one game day of the fuel its departures burned over the last fourteen game days, plus its delivery lead, and refills to two game days of it. - Always one more departure. It never holds less than the largest single departure it has fuelled, times one and a half, so a port that sees one ship a week can still fuel that ship. - Starved nodes get their backlog. Departures held for want of fuel are added to the target, so a dry airport orders what its waiting flights need rather than what its quiet ledger suggests. - New tanks hold a starting stock (20,000 litres at an airport, 100,000 at a seaport) until traffic sets their size. - Existing stock is not thrown away. A tank above its new target simply orders nothing until departures draw it down; the fuel keeps selling at the posted price. - The fuel panel shows the litres a tank now reorders at and refills to, and the burn behind them. The old capacity ratios apply only while demand sizing is switched off.