Can a directional wattmeter be used to measure SWR?
AnswerYes. A directional wattmeter can be used to measure SWR.
The official E4A08 source lists a directional wattmeter as an instrument that can be used to measure SWR.
Amateur Extra · FCC ELEMENT 4
E4A08-A
Amateur Extra · FCC Element 4 · tap to reveal · auto reveal optional