relay drone

radio relay drone

tactical communications radio relay drone

drone war (world’s first drone war)

drone field of view (drone FOV)

drone swarm attack / drone swarming attack

drone swarm's counter-drone capabilities

hobby drone (hobby grade drone)

one-way attack drone (OWA drone)

command artillery radio relay company

command radio relay and cable company

communications relay

communications relay group (CRG)

optical relay

radio relay

radio relay facilities

radio relay station

relay

relay through

relay to…

tape relay

guided missile relay working group

laser relay unit (LRU)

orbiting laser beam relay unit

starter relay

calling relay

relay transmitter

differential relay (integrated device)

frequency relay

line-of-sight radio-relay system

radio-relay communication

starter disengagement relay

line-of-sight microwave radio relay system