Online NKE file reader (.nkz and .LOG)

The essentials#

Avelsta is an online reader for NKE files. It accepts:

1. Open avelsta.app/replay: no account, no install.
2. Drop your .nkz or .LOG files in the drop area, as they are, without renaming or converting them.
3. A few seconds later, your sailing sessions show up: track on the map, curves, replay, statistics.

What you see#

• The track on a nautical chart, coloured by tack.
• The curves of speed through water and over ground (STW, SOG), true wind (TWS, TWD), wind angle (TWA), VMG, heel, pitch and current, when your instruments recorded them.
• The replay of the session, from real time up to ×20,000.
• The statistics: duration, distance, max speed, max heel.
• The polar computed from your files, and the polar percentage reached at every moment.

The files of the same outing are put back together and split into sailing sessions automatically: drop the whole content of the card or folder at once.

Free, with or without an account#

Your files are visible to you only. Without an account, everything is deleted after 6 hours, or right away with Delete everything.

Frequently asked questions#

What software opens a .nkz file?#

Avelsta opens it directly in the browser, for free: drop the file on avelsta.app/replay. Nothing to install, on Mac, Windows, Linux or tablet.

How do I read the .LOG files of my NKE Box?#

Copy the .LOG files from the box and drop them into Avelsta. They are read as they are. See Read NKE datalogger .LOG files.

Do I need to convert my NKE files before opening them?#

No. Avelsta reads .nkz and .LOG files directly: no conversion, no other software.

Can I drop .nkz and .LOG files together?#

Yes, up to 500 files per upload. The files of the same boat join the same timeline, whatever their format.

Which other formats are accepted?#

For now, NKE .nkz and .LOG files. A file in another format is flagged “Unsupported format” without affecting the others.

See also

• Read a .nkz file (NKE Processor HR) onlineHow to open a .nkz file recorded by the NKE Processor HR: drop it into Avelsta, with no software or conversion, and read the track, speed, wind, angle and polar.
• Read NKE datalogger .LOG files (Box USB Datalog WiFi)How to open the .LOG files (NMEA 0183) of the NKE Box USB Datalog WiFi datalogger: drop them into Avelsta, with no software, and get the track, curves, replay and polar.
• Supported log formats (NKE .LOG and .nkz)Avelsta accepts .nkz files from the NKE Processor HR and .LOG files (NMEA 0183) from the NKE Box USB Datalog WiFi datalogger. Data read and special cases.
• Analyse a session: map, timeline and replayOpen a session in Avelsta, read the track on the map, hover over the timeline, start the replay, zoom, compare with the polar and read the instant values.