Help? what does this mean?

Mandy
I had to go to L&D on Friday because I was having burning pain in my back and stomach. It turned out to just be acid. However, the nurse practitioner checked my cervix. She didn't tell me what it was
On my discharge paper it said 1/50/-3
Does that mean I am 1 cm, 50% effaced, and the baby's position is still -3?
I just want to make sure I'm understanding because it's my first baby and they didn't explain it to me. I tried to look it up like that online but didn't have any luck finding it written out like that.