SKU: 68943310482

Bowditch's, Vol. 2, (2017): American Practical Navigator: Epitome of Navigation

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Bowditch's, Vol. 2, (2017): American Practical Navigator: Epitome of NavigationMany useful tables and glossary of marine navigation are in volume II Due to critical feedback from academia, the 2017 edition reconstitutes several deleted or abridged chapters removed from the previous two editions. The additional text warranted the return of a two volume format with the useful tables and glossary of marine navigation located in volume II. CHAPTER 1, MATHEMATICS CHAPTER 2, INTERPOLATION includes discussion on single, double, triple

Many useful tables and glossary of marine navigation are in volume II
Due to critical feedback from academia, the 2017 edition reconstitutes several deleted or abridged chapters removed from the previous two editions. The additional text warranted the return of a two-volume format with the useful tables and glossary of marine navigation located in volume II.
CHAPTER 1, MATHEMATICS
CHAPTER 2, INTERPOLATION includes discussion on single, double, triple and nonlinear interpolation (with Bessel's formula included).
CHAPTER 3, NAVIGATIONAL ERROR The chapter goes into greater depth on the subject than the 2002 edition.
CHAPTER 4, CALCULATIONS AND CONVERSIONS summarizes the formulas the navigator depends upon during voyage planning, piloting, celestial navigation, and various related tasks.
CHAPTER 5, COMPASS CONVERSIONS contains information on magnetic compass error, deviation table, applying variation and deviation, along with several example problems.
CHAPTER 6, COMPASS ERROR

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SKU: 68943310482

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JW Frazier
Omaha, US
★★★★★ 4
Great battery powered edger
Style: Lawn Edger w/(1) 4.0 Ah Battery
This edger works great love the guide for along sidewalks and curbside lawns. It is a little underpowered for really thick lawns battery goes down fairly fast on the thicker areas but all in all it’s great
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Reviewed in the United States on June 5, 2026
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Aldo Torrente
Lake Worth, US
★★★★★ 1
The blade is not sharpen.
Style: Lawn Edger w/(1) 4.0 Ah Battery
I had no problems assembling the equipment. The problem is with the blade. It doesn't have any sharpen. I bough spares blades which have a different configuration and better edge. However I haven't been able to unscrew the bolt in order to install the new blade. It is extremely tied. One would think that you purchase this equipment, at a high price, and would be able to use it right away. In your dream. This is a Third World Country selling things at an incredible high prices, for the profit of the American companies using the manpower of other Third World Countries or China. Since the blade is not sharp, when you try to use the equipment it got disconnected. Therefore it does not work with the blade that comes from the manufacturer. Total disaster.
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Reviewed in the United States on June 1, 2026
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Kris Smith
Lake Worth, US
★★★★★ 5
Worx very well!
Style: Lawn Edger w/(1) 4.0 Ah Battery
Worx very well. ;) More power than I expected from a 20v cordless machine. And with the 4Ahr battery it comes with, I was able to do the drive, walks, and patio without having to change batteries. I own 2 Worx string trimmers, chainsaw, hedge trimmer, drill impact driver, and leaf blower. Love them all.
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Reviewed in the United States on May 2, 2026
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Amazon Customer
Omaha, US
★★★★★ 3
Problematic instructions
Style: Lawn Edger w/(1) 4.0 Ah Battery
The product is great once u figure out how to assemble. The instructions don’t do it. I was not happy. Every part was a challenge. The instruction book only shows a photo but not how to get it to look like the photo.
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Reviewed in the United States on May 7, 2026
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Judy Lindsey
Massapequa, US
★★★★★ 5
Works great
Style: Lawn Edger w/(1) 4.0 Ah Battery
Works great but the trenches part could be wider for what we need
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Reviewed in the United States on June 6, 2026

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