For those who might try to pronounce it phonetically, or look it up in a dictionary (some people actually still use those!)...
...in those English speaking navies that I was associated with (both English-English and American-English) "tampion" is pronounced "tompkin".
Must have come from the same chaps that pronounce "Featherstonehouse" as "Feastinghase" or "Home" as "Hume"...carry on old bean, cheerio!