When I were a lad, we thought that maximum deflexion on a meter was A Good Thing. So the ATU ('Wavemeter') attached to our school ex-WW II Wireless Sets No. 12 ('Twelve Set') was always adjusted to give peak meter values.....
That was in 1966.
15 years later, along comes (legal) CB radio in the UK. I learn about the mysteries of VSWR and tuning antennae for minimum SWR. After much tweaking and adjusting, I obtain a good match across...err, 80 channels in the 11 metre band in my car with a 'disguise' base-loaded 1/4 wave whip.
Which rather explained why there were so many complaints about the interference our dreadfully mismatched longwire antenna used to cause at school! And no wonder it was so difficult to contact other stations on our 5 HF spot frequencies (on or about 2-7 MHz. Or Megacycles as it was back then!)
A little knowledge is a dangerous thing!