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## 1 in 60

• Stephen
• Topic Author

### Stephen created the topic: 1 in 60

Hi,

Not sure if i am doing wrong or what, hope you can help.

In the current issue Navigation book(may 2009) i am trying to get through the 1 in 60 exercises from the WAC on page 4.39

Basically the coordinates given in the questions and the landmarks on the map do not match up, somtime by a significant number of mile which puts out the answer you get for all the 1 in 60 calculations.

For instance the last example (silo 1nm east.. tracking to Invernell)Invernell is given as 2935S 15108E which i make out to be about 11nm from the invernell. When i calculate the answer using the coordinates given i cannot get the same answer as you give in the book, the distance off track.. become so differnt from yours it changes all the calculations.

So which am i suppose to use? are the coordinates just a guide to help find the visual point on the chart or am i missing something else that is messing with my answers?!

Dont you just love self study

• Posts: 1961

### bobtait replied the topic: Re: 1 in 60

Stephen

It was never intended that you use the co-ordinates to solve the problem, just as you wouldn't [couldn't] do in practice in the cockpit. The co-ordinates were given simply to assist people with no local knowledge to locate the feature described. Use the feature as you would in practice. Good luck with your studies.

Bob

• Stephen
• Topic Author

### Stephen replied the topic: Re: 1 in 60

Thanks for the help Bob,

When you put it like that it makes total sense! I guess i am starting to get a little stressed out getting so close to my exam

Will the CASA exam give the same coordinate help for those of us with no local knowledge or do i need to spend some more time getting to know the locations on my charts?

Stephen

• Posts: 1961