helterskelter

These days a lot of them will nag you if you don't connect them to the internet and only use them as a dumb display.

Sorry, last thing:

https://www.starpath.com/catalog/books/1992.htm

This is a workbook and records the data used for navigation by sextant to Hawai'i. Good for practice.

All that being said, honestly I'd just review trigonometry a little and pick up a copy of Celestial in the GPS Age and fill in the gaps from there.

Well you can actually go an easier route, it just depends on whether you want to do it kind of mechanically or want to get intimate with all the workings of it. You can use HO 229/249 sight reduction tables and avoid a lot of fuss. Personally, I'd prefer to know how to calculate everything so I have a deeper understanding of what I'm doing. Plenty of books will walk you through all the steps, especially using the sight reduction tables, but I always walk away feeling like I'm missing something.

Anyway, I was reading Merle B. Turner's Celestial for the Cruising Navigator, before I decided to focus on trig for a while. IMHO, it doesn't explain some of the trigonometric formulas as well as it should, or how they were derived, and I just can't learn that way. It's actually not a bad book, but I did find myself consulting a lot of outside resources (mainly with trig and some astronomy). The main problem with it to me is just not explaining how some formulas were derived. It's more dense than most books, but very informative.

For math, there's the book linked in the previous comment, and I'd also recommend looking at:

- An Introduction to Spherical Trigonometry by J.H. Clough-Smith -- I actually found Trigonometry for Navigating Officers in it's bibliography.

- The Elements of Navigation (1E) by Charles H. Cotter is an all-inclusive navigation book that starts with all the necessary trig in the first few chapters. A WORD OF WARNING THOUGH: I started reading the third edition of this book (revised by Lahiry) and it had so many mistakes in it I threw it out; honestly I'm not sure how it got published. Go on abebooks or biblio and buy the 1E if you're interested. I'm starting to work this book concurrently with Trigonometry for Navigating Officers and it's great so far, if dated (published 1958 IIRC).

For some books I own but haven't really started on in earnest yet,

- Celestial in the GPS Age by John Karl is supposedly an excellent resource, and I believe it even introduces a new method for fixing your position. It also gets into more of the "why".

- Dutton's Nautical Navigation (15E) by Thomas J. Cutler and Celestial Navigation: A Complete Home Study Course by David Burch are both supposed to be good as well as far telling you how to do everything, but don't appear to explain some of the "why", like the azimuth equation.

- A Short Guide to Celestial Navigation by Henning Umland is a great resource, but definitely leans more technical. You can find the PDF here:

https://www.celnav.de/page2.htm

Besides that, you'll obviously need a Nautical Almanac for the current year (you can find a PDF online), and you'll probably want a copy of:

- Bowditch (American Practical Navigator). This is the definitive reference for anything navigation, it's published by the USCG and you can also download it for free:

Part 1:

https://thenauticalalmanac.com/2024_Bowditch-_American_Pract...

Part 2:

https://thenauticalalmanac.com/2024_Bowditch-_American_Pract...

You can get a print version from Paradise Cay Publications, it's both parts of Bowditch in a single hardback:

https://www.paracay.com/2024-american-practical-navigator-bo...

Norie's isn't strictly necessary IMO unless you're doing some serious offshore boating like crossing to Hawai'i. Just use a calculator while you're learning. Learn to use Norie's after you're comfortable and keep it as a backup onboard.

You may also be interested in checking out Starpath, which is based in Seattle, and I believe you can even drop by and talk to somebody who's more knowledgeable than I:

https://starpath.com/

They publish the David Burch books, and offer online courses.

Celestaire is another good shop for celnav:

https://www.celestaire.com/

Anyway, this was longer than I intended but I hope this puts you in the right direction!

Interesting bit of trivia, Greenspan was in Ayn Rand's inner circle and read her drafts of Atlas Shrugged as it was being written, and they were close friends until her death.

Here you go:

https://www.google.com/books/edition/Trigonometry_for_Naviga...

See my other comment:

https://news.ycombinator.com/item?id=48623646

Trigonometry for Navigating Officers by WP Winter

https://www.google.com/books/edition/Trigonometry_for_Naviga...

I found this book because I was a little rusty on my trig and most celestial navigation texts will just throw the PZX equation (and others) at you without breaking down what's actually being done with it on a mathematical level...it's just kind of treated like a magical black box without any discussion, and I'd rather have a complete understanding of what I'm doing and why. Having an application-specific approach also makes it a lot easier to learn.

I'm using it with Norie's Nautical Tables, which has the log tables and a whole lot else:

https://bluewaterweb.com/product/nories-nautical-tables-2025...

I'm sure there are plenty of free PDF's of log tables you can find though.

(I believe they used log tables on boats primarily because it's easier to use than a slide rule when everything is constantly rocking back and forth.)

Logs are awesome. I started a math textbook from the 1920's a while ago, and all the calculations relied on tabulated logs, where you would convert the number to a log in a table to reduce the operation's degree, then convert back to the ordinary representation. This would reduce operations like finding cubed roots to division, would could be converted to log-log to be further reduced to subtraction before you would restore to ordinary notation. It feels like you're using a magic wormhole or something when you're doing this stuff by hand, it's really neat.

Good. Intel's equivalent processors have this feature and BS market segmentation is the kind of thing that AMD was historically against. Even if something wasn't officially supported, they didn't go out of their way to prevent its use.

> There is no way to change this, for example, in Android without basically rooting it and changing the system fonts.

I am really surprised Android won't let the user select their own system font. This is a huge accessibility problem, especially for dyslexics.

There has to be a better way of representing a population than our current system. There is just no way you can represent real, complex, demographics in a fair and proportional way -- there are an unlimited number of ways to categorize people, and by grouping them one way you will often exclude grouping them in other, and perhaps not less significant ways. What you end up with is a very skewed representation of a population that's only bounded to reality through our notions of which category they belong to.

I don't know much about this guy, but I remember reading an interview with him maybe 15 years ago where he was asked if his lifestyle had changed since he came into money and if he bought a new house or anything, and his answer was basically something like: "Not really, and I've already got good water pressure where I'm at, what else do I need?" I can't help but like his attitude.

A sudden outbreak of common sense. I'm genuinely surprised this was a unanimous decision and that it was being argued by the ACLU, which normally takes a dim view of 2A.

Ridiculous because AMD built their reputation off of avoiding BS market segmentation like this. It's ironic that the equivalent Intel model has this feature.

This has implications beyond simply securing against physical access attacks, but also protects against rowhammer and its ilk.

Between this and their recent botched software update verification I'm getting a little wary of AMD.

%s/you\'re/your/

At this point I wouldn't be surprised if they thought it was a DEI thing.

Things like this can actually be a good way to nudge a company in the right direction sometimes. Nobody uses those internal review systems, and sometimes their stats are actually important. A handful of users might make up a really big chunk of the reviews.

In a similar vein, I once met a woman who told me how she would enter every single one of those stupid contests that you'd see printed on cereal boxes and ice cream containers because literally five people enter into those things, so you're odds of winning are surprisingly high. Apparently she won a bunch of them, but her favorite was when got a week long vacation that included going on a fishing trip with Ben and Jerry of "Ben and Jerry's".

We got the mpreg emoji instead of a chainsaw, which makes me feel like we need an emoji lobbying group for things like sex, drugs, sawed-off shotguns and jury nullification.

I believe those are the Tibetan Buddhists.

It's be cool to dual boot with a Linux that has a ~1s boot time, drops you into neovim and lets you save text files to a shared partition.

> However, not all causes of depression or addiction are about accepting death, or a salience / meaning problem, and even when that kind of issue is involved, a momentary experience of profound meaning is NOT actually necessarily transformative either (i.e. you can and in fact must still choose how to interpret that experience, once out of it).

I don't think it's (just) encountering the profound that ends addiction, I think it really just alters or "resets" your brain structure. I know somebody who had bit their nails for their entire life well into their 30's and after a mega dose of mushrooms they just stopped. It wasn't a shift in perspective, they just didn't have that habit anymore, or even the thought of it. They didn't even notice they stopped biting their nails until they had trouble typing.

It also seems to alleviate nerve pain, and apparently enabled one man paralyzed below the waist to walk again. Something really fundamental is getting altered.

Relevant:

https://www.theguardian.com/science/2026/may/05/magic-mushro...

Also

https://www.outsideonline.com/outdoor-adventure/exploration-...

I saw it with a family member that had glioblastoma. It was weird, one of the nurses had seen it quite a few times apparently, it's also known as rallying. Family member's situation was similar to sibling comment's family, it wasn't right before death, just in the days and weeks leading up to it. It was like a sudden burst of vitality that came of nowhere, like their condition had dramatically reversed itself.

I'm sure it's a little different for everyone though.

Interestingly, lithium does seem to protect telomeres and in fact lengthens them, which may affect Alzheimer's.

You can also score the ends of the rounds with your saw about an inch deep, laid out radially like you're cutting a pizza, then work your wedges in.

Fnord Knox

If it came from the base of the tree the wood grain will probably be squirrelly and practically unsplittable. Get a chainsaw or hydraulic woodsplitter, or throw them in a bonfire. Alternatively, use them in a woodworking project or innoculate them with your favorite mushroom spores.

You mean the CountyComm? If so, I'm 99% certain that radio is a rebranded Tecsun PL-360, which is in fact a 5V. I love Tecsun, but why they would cheap out on the USB-C refresh is beyond me.

https://www.tecsun-radios.com/product/pl360-radio-receiver/

There's an otherwise decent shortwave radio out there that was originally charged with a micro-usb, then they released a "new" USB-C model...except it will only charge with a 5V brick because they literally just swapped out the ports. Really annoying.

> I miss the part where the axe gets stuck and you hsve tovturn it over.

Hit it around the edges, like taking a chord from the edge of a circle, and try to use the top half of the bit to do cutting. Good ax technique depends on accuracy, on top of which you can slowly add strength as your accuracy improves. If there's a crack in the end of a round, you should be able to put the bit of the ax directly into it, which will normally split it wide open without much effort. Different species of wood have different characteristics though, so terms and conditions apply.

There's a surprising amount of technique and knowledge that goes into splitting firewood. It isn't rocket science, but I know a 75 year old who can chop wood faster than any young guy who works out at the gym.