---
title: "UNFROZEN — aviation glossary — OnlyPlanes"
description: "The Scheduled Time of Arrival (STA) tags, which are still being rescheduled by the time-based flow management (TBFM) calculations."
canonical_url: "https://onlyplanes.ru/en/learn/unfrozen"
locale: en
meta:
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  "og:description": "The Scheduled Time of Arrival (STA) tags, which are still being rescheduled by the time-based flow management (TBFM) calculations."
  "og:image": "https://onlyplanes.ru/images/aviation/aircraft/boeing-787.webp"
  "og:title": "UNFROZEN — aviation glossary"
---

> Index of every page on this site: [llms.txt](https://onlyplanes.ru/llms.txt)

Operations

# UNFROZEN

TERM · Operations

At a glance

## Meaning of UNFROZEN

The Scheduled Time of Arrival (STA) tags, which are still being rescheduled by the time-based flow management (TBFM) calculations.

### More about UNFROZEN

The Scheduled Time of Arrival (STA) tags, which are still being rescheduled by the time-based flow management (TBFM) calculations. The aircraft will remain unfrozen until the time the corresponding estimated time of arrival (ETA) tag passes the preset freeze horizon for that aircraft's stream class. At this point the automatic rescheduling will stop, and the STA becomes “frozen.”

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