Invisible - difficult or practically unachievable to determine; imperceptible by the attention; "the invisible person"; "invisible rays"; "an invisible hinge"; "invisible mending" vt ship → bemannen; fortress, barricades, checkpoint → besetzen; electric power station, pump, gun, phone etcetera → bedienen; pickets → bewachen; the ship is manned by a crew https://www.gboyle.nl/productfotografie-een-gids-voor-kleding-fotografie/