The first day of Dayton Hamvention 2019 began with prompt crowds streaming in as soon as doors opened. ARRL Expo was one area that drew fair attention, with the addition of a booth for the new ARRL and Dayton Hamvention Mobile Event App. Available for free download, the app provides maps of the entire fairgrounds, booth layouts in every building, schedules of forums and presentations, and other functions that help attendees plan their Dayton Hamvention weekend. ARRL Convention and Event Coordinator Eric Casey, KC2ERC, who assisted in coordinating the app’s functionality, stayed busy demonstrating and promoting the app to visitors. Casey said that despite the downside of occasional connectivity problems due to the crowd, the app has been received very positively, with many especially enjoying the convenience of the maps. Early morning saw ARRL Laboratory Manager Ed Hare, W1RFI, giving a forum about the inner-workings of the ARRL Lab. A lively presenter, Hare introduced Lab staff, explained what they do in the lab, and told some “stories too outrageous to put on the slides,” drawing ripples of laughter across the audience as a bright start to an overcast and driz...