Hi Bob,
I've sailed both of my Nacra 5.5SL's ('93 & '97) many years at Heckscher without ever touching bottom, boards all the way down. I do, however, check the charts when going somewhere new.
I sail out east now, but hope to do some races/events at Hecksher next summer, so I look forward to meeting you.
Good luck!
Steve Bellavia
Hobie FX-One, Hull #202, Sail #211