Glad you are enjoying the mod.
With the exception of Stars, all stellar objects have abilities with a sector scope. SE5 erroneously lists such sector abilities in the System abilities report, sometimes. This happens in stock too, IIRC. Note that Stars have some abilities that do affect the entire system. Erratic solar emissions and violent eruptions are much fun.
The Sight Obscuration ability is equivalent to Cloaking Device/Stealth Armor cloaking ability (presumably the only difference being that Sight Obscuration is always on, and Cloak Level can be de/activated). Note that Cloaking Device 9 has an ability value of 10. Thus, obscuring storms/asteroids with ability amount 10 are equivalent to CD 9. IIRC, equivalent levels of Tachyon Sensors beat Cloaking Devices. Tachyon Sensor 9 should be sufficient to detect hidden ships. If my memory fails, Tachyon Sensor 10 will definitely do the trick, since it has ability amount 11.
I'm not sure what would happen if I add multiple Sight Obscuration ability chances for storms/asteroids, with varying ability levels. Which would take precedence, the lowest or the highest? Someone needs to test it. :shiftyeyes: