I haven't noticed many startups working on bringing modern tech to recreational sailing and cruising.
Systems aboard a typical 35-50 foot sailboat produce interesting data streams, but the data don't seem to be used innovatively or interestingly.
This makes me wonder if the market is too small compared to the unicorn-level valuations most seem to aim/hope for.
Kind of putting this out there because I'm a liveaboard sailor looking out for startup ideas and it would be amazing if it were in the marine-tech space. So any feedback/suggestions would be more than welcome.
The market is small, there are existing competitors, and things change slowly. I also suspect that there isn't much value that startup could bring. I bet there are fancy products for fancy yachts.
There is a lot of open source going on. There is OpenCPN chart plotter. There is also NMEA OneNet which uses Ethernet so should support things that radars, plus make wiring easier.
Perhaps still a big enough space for a bootstrapped indie business, for lack of VC scale.
NMEA is quite interesting, though. Coupled with Czone for digital switching and power readings, I bet there is some interesting insight waiting to be discovered, one that can be monetized.
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After hopping onto VPN and getting it to work I discovered that pointing my DNS to CloudFlare appears to be an issue.
Reasonable answers:
;; ANSWER SECTION:
okra.ng. 60 IN A 13.225.63.61
okra.ng. 60 IN A 13.225.63.113
okra.ng. 60 IN A 13.225.63.21
okra.ng. 60 IN A 13.225.63.37
;; AUTHORITY SECTION:
okra.ng. 211 IN NS ns-1302.awsdns-34.org.
okra.ng. 211 IN NS ns-1628.awsdns-11.co.uk.
okra.ng. 211 IN NS ns-644.awsdns-16.net.
okra.ng. 211 IN NS ns67.domaincontrol.com.
Answers via 1.1.1.1:
;; ANSWER SECTION:
okra.ng. 60 IN A 52.85.247.56
okra.ng. 60 IN A 52.85.247.35
okra.ng. 60 IN A 52.85.247.69
okra.ng. 60 IN A 52.85.247.124
Not sure what to make of the lack of an authority section.
`dig @1.1.1.1 okra.ng` should allow you to reproduce (or perhaps my computer is simply hallucinating).
It's normal for geo-located services to provide different IP addresses depending on the resolver. You can resolve DNS from around the world with different resolvers/providers here: https://dnschecker.org/#A/okra.ng
Do a Whois on the IP address (ex. https://whois.arin.net/rest/net/NET-99-86-0-0-1/pft?s=99.86....) and you will find who it's registered to. All of the different IPs belong to AMAZO-CF. This is almost certainly Amazon CloudFront, providing different endpoints (with different IPs) around the world depending on where the resolver is.
You're getting different IPs depending on whether you use one network or another, or one DNS resolver or another, because that's how CloudFront works (in this configuration).
WRT the certificate errors: It's of course possible that one endpoint out of many could have had a problem serving a certificate, but CloudFront is a pretty reliable service; it's likely if there was a problem with one endpoint it would have been happening with all of them. The most likely reason for certificate errors for one person in this case is the problem was on the user's end.
Entirely possible it’s something on my end, but if so it’s impacting all of my iOS and macOS devices (haven’t spun up a Windows VM, suppose I could do that), both via web browsers and openssl itself.
That's the usual cause of protocol errors. The other one is unable to get a common cipher but that seems unlikely on a modern machine. Maybe try the connection with openssl and see if you can get some details.
Works for me too. Have you modified your trust store and removed signers? It's signed by the Amazon Root CA, so it's a short chain, but if you removed them then it would show as invalid.
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This dates back to 2014 where Turkey was still struggling with the aftermath of widespread civil unrest. The entire nation found itself highly polarized while debates were fueled with mutual anger and disbelief.
Taiwan use it for their multi-stakeholder decision making to find points of agreement. Their application of it to the Uber vs Taxis situation was quite interesting.
That does sound interesting. Also for the fact that I'd never seen clojure and javascript living in the same codebase, I was expecting python for data handling.
But I digress.
I believe there's a lot to do to find reason in out fundamental unreason as human beings and looks like lots of smart people have ventured into solving this problem.
Arguman's fallacy system is really an anti-feature. It's impossible to separate the claim that a specific argument is a fallacy from a counter-argument. Many people seem to think that you can just take a word describing a kind of a argument, attach "fallacy" to it, and you have refuted it.
Agreed. While logical fallacies are useful to teach people to avoid critical thinking pitfalls they are not useful to sift through the merits of arguments.
But is that a problem with the tool, or the lack of sufficient contribution on the topic from sufficiently interested and invested people like subject matter experts?
Yes, different boat profiles is on my list of things to add at some point. There are some impressive global races [1][2] that happen every few years using some interesting boats, so it would be neat to follow along virtually in this way.
If you ever get tired of sea-going vessels, I read an account of the Graf Zeppelin's 1929 circumnavigation which claimed that daily route planning was very similar to sailing in that taking advantage of weather patterns gave them significant deltas on top of the motors.
Since you seem to be really into making yogurt and like your science, I wonder, have you ever tried using "dew" as your starter?
There's an old (unfortunately dying) tradition in Turkey where dew you collect at sunrise during late spring, early summer can be used to ferment fresh milk to make the absolute best yogurt.
I live in Turkey where yogurt is an essential part of our diet and culture and nothing beats a homemade pot with a thick layer of cream on top.
I can assure you, you'll never need to buy any more starter, ever! As long as you save some for the next batch, you're golden! If you can use unprocessed milk purchased directly from a dairy farm, that's even better as I promise your tastebuds will rejoice! :)
> so that you get pushed to the surface with zero effort
This is not always true.
Your buoyancy decreases as you go deeper (and have more water above you, causing more downward pressure).
At a depth of 30 meters (100 feet), the pressure is 4 atmospheres, 4 times that of sea level.
Furthermore, not everyone is positively buoyant. The less fat one has, especially if not wearing diving suit, the more likely staying afloat/level to become harder.
As the depth increases, lungs and all bodily cavities shrink, further adding to one's density.
So, at 30 meters, it is actually quite a struggle to swim back up, even more so if you've lost your fins.
As for weights, I used to work out and exercise daily. During that time, I also dived few times a week spanning various sea conditions throughout the year and never have once taken weights as I was already negative.
Fast forward 2 years to today, I put on 15kg (33 lbs) and I need 10kg weight to enjoy my dive. But on the upside, I'd probably skyrocket to the surface if needed, lol :D
> Your buoyancy decreases as you go deeper (and have more water above you, causing more downward pressure).
This statement is wrong on many levels. I'll try to correct just one part:
Your buoyancy must NOT decrease as you go deeper. That's one of the fundamental rules you need to follow if you want to dive more than once :) If you don't watch your depth and take necessary steps to maintain neutral buoyancy, you'd sink like a stone (or rise like a balloon). Nobody wants that.
What you mean is: you need more air in you buoyancy compensator (BC) to maintain neutral buoyancy (= keep your volume constant) as you go deeper.
If you don't take weights, you need to inflate your bc to lift you. In an emergency, you generally don't have time to swim up anyway.
All that said, I was just trying to point out that it was possible to "fall home" from underwater, assuming you are within the limits of your equipment.
A buoyancy compensator, filled with a fixed quantity (not volume) of air, does decrease in volume as you descend and the pressure increases. You'd sink faster and faster if you did not add air as required. Therefore, you must actively manage a BCD!
On the way up, the opposite happens. The quantity of air in your buoyancy compensator has an increasing volume of air as you rise and the pressure decreases, providing you with increasing buoyancy. Uncontrolled, this would rocket you towards the surface. Therefore, you must actively manage a BCD!
Lungs do not change in volume in SCUBA as they do when free (breath hold) diving, because your regulator is allowing you to constantly breathe air which is at the same pressure as the water around you.
When free diving, you carry weights to be neutrally buoyant at around 30 feet. Above the neutral buoyancy depth, you float towards the surface, and must swim down to descend. Below the neutral buoyancy depth, you become negatively buoyant, sink increasingly quickly, and must swim up to ascend. This is also important to be aware of; you don't want to strap weights to yourself that you can't drop: You may think you're capable of swimming up against your negative buoyancy, but if you only test at 10 feet under you may not be capable when you get deeper!
>(and have more water above you, causing more downward pressure).
But also higher pressure pushing you upwards too! Buoyant force is equal to weight of displaced fluid, and so is independent of depth. (edit: given same fluid and temperature) (edit2: and well, buoyant force will be slightly stronger because fluid will be more compressed at the bottom)
No, higher pressure does not push you upwards. That's all about buoyancy and a liter of water weighs just as much at the bottom of the ocean as it does at the surface. That higher pressure works on all sides of your body which means it cancels out.
I reckon that water under high pressure does have a somewhat higher density. However water is pretty much the textbook example of an incompressible fluid so the difference will probably be rather small.
Edit: Found a direct quote on wikipedia https://en.wikipedia.org/wiki/Properties_of_water#Compressib...:
>The low compressibility of water means that even in the deep oceans at 4 km depth, where pressures are 40 MPa, there is only a 1.8% decrease in volume.[40]
Water is tremendously stable, cheap and commonly available, that's exactly why it - and nowadays oil - was used since time immemorial as a working fluid to transfer force from one place to another. In essence the limiting factor is the burst strength of the tubing.
Yes, I just wanted to correct OP statement that "and have more water above you, causing more downward pressure" by pointing that increasing pressure exerts force on bottom side, so in effect it cancels out increasing pressure pushing at top, and so buoyant force is constant. (with added trivia about minuscule changes due to fluid compressibility)
> Furthermore, not everyone is positively buoyant. The less fat one has, especially if not wearing diving suit, the more likely staying afloat/level to become harder.
I'm not sure if it is just me, but I could not understand this at all. Do you mind rephrasing it? Which type of person has a harder time stating afloat?
Fat can naturally float on water due to its density being less than that of water.
The more fat one has, the less overall average density becomes, making it harder to sink. I have a close friend who is very overwheight and she can practically sit upright floating. I must admit I'd usually envy her when I struggled staying afloat while she enjoye a cool refreshment like it were her couch :)
So in short, less fat, more muscle mass, more bone mass harder to stay afloat.
Also the diving suite (which is made from a foam-like material) and some of the hallow diving gear make it harder to sink, hence the need for weights.
Systems aboard a typical 35-50 foot sailboat produce interesting data streams, but the data don't seem to be used innovatively or interestingly.
This makes me wonder if the market is too small compared to the unicorn-level valuations most seem to aim/hope for.
Kind of putting this out there because I'm a liveaboard sailor looking out for startup ideas and it would be amazing if it were in the marine-tech space. So any feedback/suggestions would be more than welcome.