I got caught out on that yesterday also, along with 3 other boats !
Nice day so give boat a run I thought, checked lifting times day before and chose the 11.30 lift............wrong , no lift.
To make matters worse the outgoing air draft sign was not illuminated so could not tell if safe to go under.
Called bridge control , asked about air draft light and was told it was turned off for
" SAFETY ISSUES "??? I asked if could be turned on for 15 minutes so we could gauge height to exit basin...........reply came back " NEGATIVE "!!!!
So I sat it out for the 12.30 and went for a spin.
Stupid thing is the incoming air draft light was working !
What is going on ???