Highlights in this issue include a conversation with FLIR's Tom Frost, dossiers on the Tecdron TC-800 FF and the Robby Moto UAVE as well as a look at the Teledyne SeaRaptor. An insight into USV's and we look at the Singular Aircraft FlyOx. Show reports from AUVSI Xponential 2019 & Ocean Business 2019 as well as focus articles covering propellers, simulation and testing.