I just missed the R188 today, mostly because I was riding with some cousins and they were in a rush. I have a really good tip to catch the R188 - ONLY AT TERMINAL STATIONS!
First, you have to see the R188 in order to estimate the time. I saw it at 103rd Street today while heading to Manhattan on the .
I estimated the time it would arrive at Flushing, which was around 4:00 PM.
One trip on the local would take 40 minutes, so it would arive at TSQ at 4:40.
I would go around 7:00 PM, and I estimated it would be at TSQ at 7:20.
I always estimate a little early to arrive there and wait. Since we were in a rush, we just took the R62A that was there.
At approximately 7:22 PM, I assume (by the looks of the train) that the R188 was approaching Bryant Park and was heading to TSQ.
During the 30 day test of 7811-7821, I used this method time and got the train in time. Really good method if you are really wanting to hunt that R188!
On another note, 7811-7821 was sitting in Corona Yard today as I passed by. Don't think it would be in service any time soon, unless maybe 7822-7832 has a problem and they are short and have to run that set.