U.S. Navy
@USNavy
Welcome back to the surface, Shipmates Anchor Flag of United States
#USSSanJuan (SSN 751), operating under Submarine Squadron (SUBRON) TWELVE, returned to its homeport in Groton, Connecticut, completing a successful seven-month deployment. #SubmarineForce
9:07 AM · Aug 26, 2021 · Sprinklr Publishing
https://twitter.com/USNavy/status/1430879490956214276
From what I understand (past q drops) yes the jolly roger pirate flag = successful combat mission.
Also the sub #751 caught my eye.