Is it a bug or did I just got lucky?

[RodBorza]

TMO 2.0, RSRD - USS-Plunger (SS-179) -July 1942 - Third patrol - First patrol with SJ radar - 90 % realism - Map updates on - Event Camera on

Got off Pearl to the Aleutians in order to do a barrier patrol.
Halfway there I receive a radio message saying that a Japanese task force will try to ressuply Kiska (you gotta love RSRD!).





So, I order full ahead and get there two days later, right in time to intercept a merchant ship and its escort destroyer traveling at 18 kts. Fire at the two, got the merchant with two hits but the destroyer escapes. (unfortunately I don't have any screen shots for that). Now I'm the hunted and she is pretty insistent. Four hours later I manage to escape, and I take an extra two hours to surface far away from that destroyer. Of course, my feeling for revenge is at the max and then the opportunity presents itself. My surface radar detects a single target stopped at the same region where the merchant was sunk.
I start to get there and then what I see in my sights???




Yep, that's right, my very own Bungo Pete! At zero speed. What is it doing, rescuing survivors?

Anyway, the good 'old Plunger is going for the kill.



I submerge, do all the interceptions and calculations needed to get that sitting duck (Asashio Destroyer).




Then, at the right distance I fire two fishes at her. The DD detects and start moving. But it is too late. As one torp misses her astern, the other one hits right in the middle.



And there she blows!!!






Very nice! So my question is: does RSRD simulates survivor rescue? Or because I managed to destroy the merchant ship, the destroyer didn't have any more ships to escort so it just stayed there not knowing what to do?
Anyway, it may be not a great kill (BB or cruiser or something), but it was my first warship kill and I wanted to share!

And this is good'old Plunger, sailing in the setting sun to get even with the Rising Sun!