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# What Is Equal Time Point in Aviation?
- URL: https://www.acmiworld.com/what-is-equal-time-point-in-aviation/
- Published: 2026-09-14T16:35:46.000Z
- Updated: 2026-09-14T16:35:46.000Z
- Description: Equal Time Point defined for aviation professionals, with its operational or commercial use, document context and related terminology.
- Author: ACMI World
- Tags: Aviation Glossary, Airline Operations & Navigation, #Import 2026-09-14 15:41

## Definition, Documents and Application

An Equal Time Point, or ETP, is the point along a route from which the time to two selected diversion airports is equal under the planning assumptions used.

Aviation Glossary

**Term:** Equal Time Point

**Category:** Airline Operations & Navigation

## How It Is Used in Flight Operations

Equal Time Point is used within dispatch, flight planning, crew procedures, aircraft approvals or air traffic operations depending on the subject. Operators must apply the version and approval basis recognized by the relevant aviation authority.

## Operational Effect

Dispatchers use ETP calculations for oceanic, remote and EDTO planning, particularly when winds make simple geographic midpoints misleading.

## Approval and Dispatch Considerations

Equipment capability alone may not be sufficient. Operator approval, crew qualification, maintenance status, database currency, route authorization and company procedures can all affect whether the capability may be used on a specific flight.

## Related Aviation Topics

Related ACMI World coverage includes [structuring an ACMI RFP](https://www.acmiworld.com/how-to-structure-an-acmi-rfp-for-short-term-airline-capacity/), [ACMI lease pricing](https://www.acmiworld.com/acmi-lease-pricing-explained-what-airlines-actually-pay-for-capacity/), [benefits of ACMI leasing](https://www.acmiworld.com/benefits-of-acmi-leasing-for-airlines/), [international charter compliance](https://www.acmiworld.com/international-charter-compliance-guide-for-buyers/) and [wet lease versus dry lease](https://www.acmiworld.com/wet-lease-vs-dry-lease-explained-key-differences-for-aircraft-operators/).

Dispatchers use ETP calculations for oceanic, remote and EDTO planning, particularly when winds make simple geographic midpoints misleading.

Frequently Asked Questions

## Equal Time Point FAQ

What does Equal Time Point mean in aviation?

An Equal Time Point, or ETP, is the point along a route from which the time to two selected diversion airports is equal under the planning assumptions used.

Why does Equal Time Point matter?

Dispatchers use ETP calculations for oceanic, remote and EDTO planning, particularly when winds make simple geographic midpoints misleading.

Where would an aviation professional encounter Equal Time Point?

It is commonly encountered in airline operations & navigation documents, procedures, calculations or operating discussions where the underlying technical or commercial issue is relevant.

Does installed equipment automatically authorize the operation?

No. Many capabilities also require operator approval, current maintenance status, crew qualification and procedures accepted by the relevant authority.