Most helpful critical review
10 of 16 people found the following review helpful
$10 calculator ???
on December 7, 2010
The theory portion of Celestial Navigation in the GPS Age is OK. My problem is that John Karl has enough press this and press that on a calculator to make it confusing. Now if Mr.Karl had actually told the reader what $10 calculator his book referred to possibly I would have purchased same and stuck with him.
Example: Recall  press SIN, press -, recall , press x, recall , press SIN, press =, press /, recall , press COS, press /, recall , press COS, press =, press INV, press COS.
Unfortunately my $14 TI-30X IIS does not work in this order. One presses the function then the number. Yes, I can read backwards but I prefer left to right. So what $10 calculator is Mr.Karl using?
To be fair I did stop reading in the sight reductions chapter but only because of frustration with push this and push that button on some unknown $10 calculator. I'm seriously thinking about a slide rule now.
I have an old Davis Mark 12 sextant used for basic Sun work 30 years ago. My current plan is to learn celestial navigation in much greater detail for extended solo cruising but this is not the book for me, at least at the moment. Your inner workings may vary!
Who knows, one day I may find a calculator that works with this book and reread it. I am quite sure there is some good content deeper inside but for now I will be wiping the cobwebs off of Celestial Navigation By H.O. 249 by John E. Milligan I leaned on so many years ago.