I have seen many people descend into KSAN in a strange and inaccurate way. That’s fine, however if you want to add that extra realism to IF, then I’ve made a tutorial on how to approach into KSAN using real world approach plates.
Your route would want to be
RYAHH – DOUGA – VYDDA – OKAIN – CIJHI – REEBO – ZOLPA
At RYAHH you will want to be at 5000 feet at 175kts, so if for example your cruise speed was 320kts and you’re at 15000 feet, you’ll want to slow to 175kts and descend at 1000fpm at 5 minutes 30 from the waypoint.
From RYAHH to DOUGA you want to maintain 5000ft. From DOUGA to VYDDA you will want to descend to 4000 feet and slow to 150kts when you reach VYDDA. Also, don’t intercept the ILS (VYDDA) without clearance.
Now, the approach into KSAN is non-precision, which means you don’t use a glide slope, and use landmarks and such to descend. We don’t have landmarks in IF, so it makes it harder. At VYDDA you must be 4000ft, then at OKAIN you must be 3600ft, CIJHI 2500ft and REEBO 2000ft. Now you should be able to see the runway and you can land!
If you cannot see the airport 2 minutes after passing REEBO go around, and DO NOT descend below minimums (640ft) before you are on final. Hope this helps! (contact me if you want the approach plate)