Subsurface can plan and track single and multi-tank dives using air, Nitrox or TriMix. It allows tracking of dive locations including GPS coordinates (which can also conveniently be entered using a map interface), logging of equipment used and names of other divers, and lets users rate dives and provide additional notes. Subsurface also calculates a wide variety of statistics of the user’s diving and tracks information like the SAC rate, partial pressures of O2, N2 and He, calculated deco information, and many more.
Yes. Subsurface is free and open-source software released under the GPL-2.0 license.
What is the latest version of Subsurface?
The latest version is 6.0.5504, released on Dec 22, 2025.
Is it safe to download Subsurface?
The download button links to the official installer published on subsurface-divelog.org, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with c23cc1421141d271fa4d7e624f30359f047842e75843375264275abb55ad1795.
Which Windows versions does Subsurface support?
Subsurface runs on Windows and is available for 64-bit (x64) systems.
How do I install Subsurface silently?
Run the offline installer with "subsurface-6.0.5504-CICD-release-installer.exe" /S, or install it with Windows Package Manager: winget install --id=Subsurface.Subsurface -e --silent.
How do I uninstall Subsurface?
Open Settings › Apps › Installed apps, find Subsurface and select Uninstall. From the command line, run winget uninstall --id=Subsurface.Subsurface -e.
