Taff as general nickname for UK sailors, all or some

I believe you Ann, and am trying to track the reason, but no luck so far. However while searching I did find "Sharky - Navy nickname for all Wards". Since I have just been invested with a new shiny crown on a tooth this may be appropriate.

Update: Please will some of you good people reassure me that you also have, or know people who have, or at least have heard of other people who have, D'oh moments like I just had. It wasn't till I was just going to sleep hours after making the original post that I remembered my aunt on my Father's side, so her maiden name (until she married aged 63!) was also Ward. She was in the Womens Royal Naval Service=Wrens in WWII, and from 15 to 5 years ago had a dog called Sharky. I just thought it was any old canine name until now, but now presume it was from the naval nickname. I will ask her next time I see her (and also ask her about Taff). Unfortunately she suffers from a peculiar set of memory problems now, so it may take some delicate probing.
And I have some other contacts I will ask about Taff as well.
Sharky