Listings and registration on RCRacingEvents.com.  Pre-registration required. Club will combine classes at their discretion. 4 boats to make a class.  Co-hosted by RC Model Boaters of Baltimore and Delmarva MBC at the Delmarva Pond. Racers should familiarize themselves with D12 rules. District rules can be found at www.impba12.net/IMPBA-D12-Rules.html. Standard heat racing for scale classes. Audio…