The 2018 film Hunter Killer is an action thriller that follows an untested American submarine captain who must partner with U.S. Navy SEALs to rescue the Russian president from a military coup. While the movie is fictional, it is based on the novel Firing Point
How to Play "hunter killer 2018 mm submkv" Correctly
VLC Media Player (Windows/Mac/Linux): Right-click > Subtitles > Sub Track > Select English. If the subs are "sub.mkv" but not displaying, go to Audio > Audio Track and ensure it isn't on a commentary track.
MPC-HC (Windows): Go to Play > Filters > LAV Splitter to see all internal subtitle streams.
Plex / Jellyfin (Streaming locally): If you are streaming this MKV from a server, ensure "Burn Subtitles" is set to "Automatic" or "Only image formats."