Hoverfly Technologies Inc., a tether-powered drone manufacturer, announced its all-weather LiveSky SENTRY line of tether-powered UAS. The all-weather LiveSky SENTRY is designed to meet IP54 and MIL-STD-810 standards and is now a military-grade tether-powered UAS available for any mission. IP54 standards define the level of protection for extreme conditions like dust, water and moisture and MIL-STD-810 defines U.S…