What exactly does this mean (counter-detected)?

[MarkShot]

SC 1.08 Seawolf Akula Port Egress mission

What does the following mean (regarding being detected)? Usually, if you are counter-detected in their home waters, then you get a TIW. So, does this mean that someone assigned a tracker to me, but perhaps lost me before they could engage? Or does it mean that they never were able to actually ID me as a hostile? Or does it mean that they had IDed me, but didn't manage to produce a satisfactory weapons solution?

Thanks.

Captain:,LogStkCamp,Ship:,Seawolf (SEAWOLF),Campaign:,SeawolfCampaign Progress:,5 of 14
Mission:,Akula Port Egress
Resolution:,Complete
Elapsed Time:,02:00:39


Goals:
Critical
Enter the Harbor,Complete,100
Exit the area,Complete,100
Non-Critical
Track Akula,Complete,100
Remain Undetected,Incomplete,0
Track to deep waters,Complete,100


Kills:
(none)
Damaged:,(none)