Hi Steve, it looks to me the missile onboard ECM is not working as intended against incoming AMMs.
This was a test I performed in 1.9.3:
Target missile, 80kkm/s
Target missile fired against a PD/AMM platform (to make sure i fired the correct missiles):
AMMs, they do not have ECCM onboard, and has a 100% hit against ~42kkm/s, so it should have a base chance of ~52% hitting the incoming missile, if it does not have onboard ECM:
This is the ship firing the AMM, without any ECCM assigned to its MFC:
This is AMM autofiring:
Interception chance:
The hit chance is about 52%, so it seems the onboard ECM did not decrease this chance (should be 0 since it has ECM 6 onboard).The hit chance for PD guns are working as intended, affected by the onboard.
Attached is the DB for you to reporduce the issue. The firing fleet is under Earth Federation at earth, the defending fleet is under Martian Republic on Mars.