Anonymous ID: 7b739d Aug. 11, 2020, 5:04 p.m. No.10257821   🗄️.is 🔗kun

It seems like D5 refers to SLBM's (submarine launched ballistic missles).

 

https://youtu.be/ua4QMFQATco?t=640

 

Pic may or may not be me.