[D5]in the news: test launches:

https://www.google.com/search?client=safari&sca_esv=572214004&hl=en-us&sxsrf=AM9HkKkXXkLzcKleGRn9k-pt6cIT_yxRuA:1696959213336&q=trident+ii+d5+test+launch&tbm=nws

The UGM-133A Trident II, or TridentD5is a submarine-launched ballistic missile

https://en.wikipedia.org/wiki/UGM-133_Trident_II