⚠ 
Test version — do not use this as your only contest log. The logger has not been fully tested and data loss cannot be ruled out. Always keep a backup (paper log or another logger) during a contest.
That said — the aircraft scatter features are well worth trying out!
OZ7Z · JO44VW

VHF Logger

Web-based contest logger for VHF/UHF/SHF — log QSOs, calculate score, export EDI files, and track aircraft scatter opportunities in real time.

⏬ Open Logger ? Help

Screenshots

VHF Logger with scatter lines and watchlist
The watchlist has been loaded via Settings and all stations are ticked. The green lines overlay is also enabled (top right). Three stations currently have active aircraft scatter — the remaining stations show the estimated time until the next aircraft arrives on their route.
VHF Logger showing multiple scatter routes
The same view a little later — different aircraft are now in scatter position on several routes simultaneously. The aircraft are also visible on the map as icons along the green lines.

What does it do?

📋
QSO logging One-liner or form entry. Automatic timestamp, dupe detection and serial numbers.
✈
Aircraft scatter Real-time flight data from airscatter.dk. Shows which aircraft are in scatter position and when the next one arrives.
📡
ON4KST chat Built-in KST chat. Right-click a callsign to send a scatter sked request directly.
📄
EDI export Download your contest log in REG1TEST format ready for upload to vushf.dk.

Watchlist — pre-loaded stations

The Watchlist tab shows which stations you can work via aircraft scatter. You can import a ready-made list of known stations directly into the logger.

watchlist.txt English stations (G, M) with locators — ready to import
↓ Download

How to import the list

  1. Download watchlist.txt above
  2. Open the logger and go to Settings → Watchlist
  3. Click 📂 Import file and select the downloaded file
  4. The stations now appear in the Watchlist tab in the left panel
  5. Tick the stations you want to monitor — the logger will automatically show scatter ETA for each

File format

The file is semicolon-separated, one station per line:

G3YDY;JO01FQ
G4SWX;JO02RF
G4KUX;IO94BP;Kevin

Format: CALL;LOCATOR or CALL;LOCATOR;NAME. You can also create your own list and import it the same way.

Watchlist data is stored in the browser — you only need to import once. Stations you add manually in the logger are saved automatically.
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