You were using passive sonar before?
I thought either LW or even SCS got rid of that a long time ago.
Anyway, HFS being the only way to reliably detect mines is AS INTENDED. Some mine types being so small that you're lucky to see them in time, again, is as intended. That being said, the stock mines that are the size of patrol boats are still every bit as easy to see as they used to be.
(The FFG and submarines are not minesweepers, they are targets for mines)
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