That’s not necessarily true, I’m not sure what organization you are using; but SSI is different than the others on Advanced C-Card. SSI Advanced is a combination of 4 "specialty c-cards" and 24 logged dives. I’m under the understanding that obviously the original OW check out dives and 4 specialty dives must be under the instructors obviously but the other dives just need to be logged and signed by dive buddy and that’s acceptable.