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just words no difference to me

Just for you SWR = Standing Wave Ratio...................................does that help :D

same as diference between English or pom i guess :D

Its a quick way to tell if your antenna is OK and you VHF is transmitting at the correct power output.
Another quick test of the antenna on a trailer boat that travels with their antennas folded id...

antenna should be vertical for best performance. If you fold it down for transport then tie it down too cause all the flapping about as you tow the boat will make people like me happy cause we get to...