Bug/Undocumented Feature regard subs in port

[Taxman66]

Subs should not have 'submerged' defense while in a port, it makes them nearly invulnerable.

[Hubert Cater]

Hi, could you give me a few combat examples, e.g. what mode the subs were in, which units were attacking etc.?

Any extra details will help me to better understand the possible issue here, thanks!

[Taxman66]

A sub in a port is less vulnerable to air attacks if it is in silent mode than if it is in hunt mode.
This seems silly.

[Hubert Cater]

Thanks and just to clarify even further, do you mean less likely to be hit, or will suffer less potential damage, e.g. the combat predictions show less possible damage etc.

[Taxman66]

Combat predictions and results are both reduced (sometimes
to 0, depending on various stats) , there is no dive chance while in port.

For example in my game with OCB (using TRP mod which has bomber/carrier aircraft having a fixed combat value vs. Subs of 2 iirc, and subs having 0 defense):

Maritime bomber vs. Sub in port:
Sub in hunt mode: predicted 2 damage per attack actual 3 over 2 attacks

Sub in silent mode: predicted 0 damage per attack, actual damage 0 over 2 attacks.

[BillRunacre]

I've tried replicating this but am not getting different results whether the sub is in Hunt or Silent mode.

Do you have the challenge id for your game?

[Taxman66]

We're multiple turns past the event.

I suspect the sub moved into the port in Silent mode, and I believe but am not 100% sure that I attacked it the turn after it moved in.