ATMOS support

Support and Downloads

Find the latest ATMOS MISSION3 user manual, firmware information and support guides. Manuals for MISSION2 and MISSION ONE remain available for existing users. Superseded documents are stored separately in the archive.

Current product

Current MISSION3 Downloads

Use the latest manual and firmware information for normal operation. Check the firmware release notes before updating your dive computer.

  • MISSION3

    MISSION3 User Manual

    English user manual version v24v03. Covers scuba, freediving, GPS, settings, maintenance and specifications.

    PDF, English, v24v03

    Download PDF
  • MISSION3

    Latest Firmware

    Firmware for MISSION3 only. Read the update guide before installing.

    ZIP, firmware v1.109, verified 13 September 2026

    Official ATMOS support pageView firmware download
  • MISSION3

    Firmware Update Guide

    Step-by-step instructions for updating MISSION3 with a computer and USB cable.

    Web page, English

    Read instructions
  • MISSION3

    Firmware Release Notes

    Review new functions, corrections and known changes by firmware version.

    Web page, English

    View release notes

Files are hosted on the official ATMOS support site (atmos.app) and open in a new tab. Firmware and update guide apply to MISSION3 only.

Help

Support Guides

Official ATMOS guides for everyday use of your MISSION3 and the ATMOS App.

  • Battery Care Tips

    How to charge, store and look after the MISSION3 battery.

    Web page, English

    Read guide

  • Pairing and Sync Reset

    What to do when your watch and the ATMOS App no longer connect or synchronise.

    Web page, English

    Read guide

  • Android Notification Setup

    Permissions and settings needed for smart notifications on Android phones.

    Web page, English

    Read guide

  • ATMOS App

    Sync dives, manage dive sites and configure selected MISSION3 settings from your phone.

    Page on atmosdive.eu

    About the app

Earlier models

Legacy Product Support

Support documents for discontinued or earlier ATMOS dive computers. Select your exact model before downloading a manual, firmware file or computer tool.

MISSION2 and MISSION ONE update methods are model-specific and do not apply to MISSION3.

Archive

Archived Manuals

Archived manuals are provided for reference only and may not describe the latest firmware or product functions. For normal use, always consult the latest available manual and firmware release notes.

Superseded MISSION2 manuals (archived)

Warning: these documents are superseded. They are kept for reference only and do not describe current firmware or functions.

No firmware files are stored in this archive.

Warranty

Warranty and Compliance

Warranty and compliance

Products bought from atmosdive.eu are covered by the seller’s legal guarantee under applicable consumer law, including the EU minimum of two years. The ATMOS manufacturer limited warranty is an additional commercial warranty and does not replace your legal rights.

ATMOS limited warranty (atmos.app, opens in a new tab)

Returns and refunds · Terms and legal guarantee · Contact us for warranty and service

Still need help?

Contact Aqua Star Network, the official European distributor of ATMOS, for questions about your order, warranty or service.

Contact us