quick help with a nav problem

[Jon87]

Hello!

Hope someone could give me a quick hand. I'm currently studying Nav and am doing some practise tests and I've come up against this question a couple of times;

Given Hdg of 138T, a track of 141T, a TAS of 122kts and a G/S of 101kt, what is the W/V?

Now, the test tells me that the correct answer is 13121kt

But I've tried to work this a load of times and always get closer to 12221kt... I'm doubting my ability to work this out, so is there an online wizwheel where I can get super accurate answers for this? Is there a chance the test has the wrong answer against it?

Maybe someone could work this out and confirm the correct answer?

Thanks for the help,
Jon

[flapsupboy]

Try the app: Aviation Pocketknife. There you get a NAV calculator. According to the app the answer is 12422kt. You'll always find some wrong questions and answers in the bank

[RichardH]

Jon87 on the information given I too get 124/22 on my trusty CRP-5. So it looks like you are doing things correctly.

Richard (ATPL GN Instructor)

[dook]

I too was an ATPL instructor.

If you are studying for a CPL or ATPL then may I politely suggest that you ask the relevant instructor in your school.

After all, you are paying for services.

[Jon87]

Many thanks all! Good to know I'm not just crazy bad at the crp-5.

I'll check out that app too, sounds useful.

Thanks again,
Jon