and looked at the fingerings and they are different than the low D whistle that I have. For instance, on the Clarke, to make an “F” you cover the the follow:
/ / / o o o
You cover the first three holes. But on my low D that I have to make an “F” you cover
/ / / / o o. You cover the first four holes. But the weird thing is when I play a song with my Clarke that I play with my low D, I use the exact same fingerings that I use with the low D and the song sounds like it’s supposed to sound. So, how can the fingerings be different. Am I making any sense? Oh, I’m confused.
Sara
Did you receive a fingering chart with your whistle? Is that where you determined that F was ///000? That sounds like the fingering for a C whistle. The whistle should have the key (D or C) marked on it.
In any case you will find as you get whistles in various keys that you can finger ANY of them as you would a D, and your tune will still sound OK. This should never be a problem unless you are playing with other musicians.
Steve
Hello!
Yes, it came with a fingering chart. It’s a C whistle. Really, I would have thought you would have to use the exact fingerings given for each whistle. Thank you for explaining. I was feeling a tad overwhelmed for a bit. I was like, how am I ever going to memorize all of this and keep it all straight in my mind. You helped a lot. Thanks!!! 
Sara