1. simply rename your F-18’s cockpit folder inside \data\art\… will make the game use the default cockpit (i.e. F-16) for an aircraft that lacks of its dedicated cockpit.
2. AFAIK, HMCS MARK exists but currently not implemented. dont know when it will be. At least the target locked by HTS pod will be displayed in HMCS IIRC. For current steerpoint, don’t know if it’s displayed in RL.
3. I guess there’s no anisotropic RCS setting in BMS. The only thing that may matter is doppler filtering, that means if you fly low and put the hostile abeam, they may be harder to find you. Other than that, i don’t know if there is any other factor.
4. i guess the VSR is not implemented properly or maybe i should RTFM more carefully. For ULS, i’m not sure if it has longer search range, need more tests. I used to consider ULS as a mode that only searches targets higher than myself (Up-Looking Search?), but i’m not quite clear about that and i don’t know why there is such a mode. Disabling doppler filter can increase search range?