Ua777222 From United States of America, joined Dec 2003, 3348 posts, RR: 11
Reply 5, posted (9 years 8 months 20 hours ago) and read 1156 times:
It is ineed for making the turn and ending up dead on the line for the ground crew to guide the a/c into the gate. I haven't seen this before in US Domestic terminals but at SFO's International terminal they do have these. My guess is that it's for a/c in tight areas where the chance of clipping a wing is high but then again you'd think the chance of that happening would be high at any gate with any a/c of any size!
When I looked at it a circle wasn't the first thing that came to my mind