The Biden administration is planning to send Ukraine advanced electronic equipment that converts unguided aerial munitions into “smart bombs” that can target Russian military positions with a high degree of accuracy, according to senior U.S. officials familiar with the matter. The kits incorporate global positioning devices for precision and can be bolted onto a variety of weapons, creating what the Pentagon calls a Joint Direct Attack Munition, or JDAM. The U.S. military has used the technology on bombs weighing up to 2,000 pounds, usually incorporating it with bomber aircraft and fighter jets. It was not immediately clear whether President Biden...