# Safety and limitations

> <mark style="color:$danger;">NOT FOR OPERATIONAL USE</mark>
>
> <mark style="color:$danger;">AvComp is a personal reference aid. It is not approved flight planning software, dispatch software, aircraft performance software, or a substitute for company procedures.</mark>

## <mark style="color:$warning;">Use approved sources first</mark>

Use your airline, aircraft, regulator, dispatch, ATC, and official weather sources as the controlling references. AvComp can help organize and calculate information, but it does not replace operational decision-making requirements.

## <mark style="color:$warning;">Check imported data</mark>

When loading an OFP, verify important values against the original OFP:

* Flight number, date, aircraft, registration, route, STD, and STA.
* Fuel figures, especially block fuel, trip fuel, final reserve, and alternates.
* Waypoint times, EFOB values, and alternates.
* Weather and NOTAM text.

## <mark style="color:$warning;">Local storage limits</mark>

AvComp stores sessions in the browser on your device. Data may be lost if you:

* Clear browser data.
* Use private browsing.
* Change browsers or devices.
* Remove the PWA and browser storage.
* Run a device cleanup that clears website data.

## <mark style="color:$warning;">Weather limits</mark>

Weather data depends on the live public feed used by the app. Some airports may be missing, delayed, stale, or temporarily unavailable. Always check official sources before using weather operationally.

## <mark style="color:$warning;">Calculation limits</mark>

Calculators depend on the values you enter and the assumptions shown in the tool. Confirm any critical calculation with approved company or aircraft sources before use.


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