I was looking at the Los Angeles area on sky vector, and I noticed a tiny little triangular class D area right next to LAX. It shows that the height of the class D goes up to 2,500, but I couldn't see an airport in there, not even on the TAC.
Only if you click on "LA West Heli" on the top right on sky vector can you see that there is a heliport in that little area called "Chevron Refinery". On airnav, it says the identifier is 4CA6, and it says it does not have a control tower.
I have so many questions. Why is it class D if it has no control tower? Can a heliport even be class D? Why the actual heliport not appear on the sectional or even TAC? Can someone help me? :)