After a winter of go-arounds, a hub rewrites the low-visibility plan

Osterfeld airport, a northern European hub with a reputation for orderly fog, has rewritten the plan it uses when runway visual range drops through the categories crews actually fly. Last winter the field recorded a cluster of go-arounds on a single runway that, taken one by one, were each correct and, taken together, stacked arrivals back to the coast.

The new procedure does something unfashionable. It slows the arrival rate earlier, before the category is formally breached, and it tells airlines the slower rate in a machine-readable message rather than in a phone call to the operations desk. The tower keeps the authority. The airlines lose the right to be surprised.

“A go-around is a success,” said controller and project lead Mateus Grimm. “Forty go-arounds in ninety minutes is a design. We were flying a design we had not written down.”

Airlines that use Osterfeld as a bank have complained that an earlier slowdown will cost them the inbound that makes the outbound. Grimm’s answer, in the brief, is that the outbound was already lost — it was just lost later, and with more fuel burn. The procedure goes live on 1 November. The first real fog after that date will be the only audit that matters.