As for regular yachts - drop a drogue, run before the storm with a bare minimum of sails up to maintain steering ability, try to keep the waves on your stern.
[1]: https://www.saildrone.com/news/tropical-atlantic-hurricane-m...
Shameless plug of a youtube channel I enjoy, here's a guy installing one of those in their CNC machine to make better footage [2].
[1] https://en.wikipedia.org/wiki/Clear_view_screen [2] https://www.youtube.com/watch?v=lYAnOheWHEA
Also surprised at the scale of the things, the smallest model is 7 m (23 ft) long, the largest is a whopping 22 m (72 feet).
Pretty cool things!
https://en.wikipedia.org/wiki/National_Oceanic_and_Atmospher...
Key Features:
* Robust, Light-Weight Communications for at Sea Operations
* Certus 700 Services (352 kbps Up/704 kbps Down & 256 kbps Streaming Capable)
*100% Global Satellite Coverage and Low Latency for Critical Data and Voice Communications
1. https://blogs.nasa.gov/earthexpeditions/wp-content/uploads/s...
2. https://www.thalesgroup.com/en/markets/market-specific-solut...
3. https://www.thalesgroup.com/sites/default/files/database/doc...
4. https://en.wikipedia.org/wiki/Iridium_satellite_constellatio...
5. https://seatech.systems/product/thales-vesselink-700-for-iri...
If you’re stuck at sea with a hurricane barreling down you can try to sail around the equatorial edge of it (in the northern hemisphere you try to sail south of it). Hurricanes tend to veer away from the equator. Moreover the wind and waves will be behind you, so you’re less likely to get knocked over by a gust or a wave. The boat is quite literally surfing.
If things get really bad you might heave-to which is a way to work the wind against itself causing the boat to mostly stall. It’s supposed to be very safe in heavy winds, but you would be pointing at the waves which is bound to be unpleasant.
Finally, a sailboat’s keel is very heavy. Check out the diagrams at [1]. The mast has to be well below water before the sailboat prefers turtling to upright.
There are also the opposite - rogue holes - the trough part of a wave. Imagine being in a boat and dropping 100ft.
Right here is a link to the web site: https://www.nhc.noaa.gov/
Their forecasting graphics (probability distributions of tropical cyclone tracks, wind speeds, rainfall, et cetera, all overlaid on maps) are direct and easy-to-read, and do a good job of conveying the uncertainty of the behavior of these storms in a way that's legible to a lay person.
[1] https://www.bloomberg.com/news/features/2018-06-14/trump-s-p...
Though when you can get those elements together, the result is gut-clenching. What does it for me is Big Wave surfing at Nazare. Camera's on land, horizon is fixed, motion is clear, and the ant on the face itself gives perspective. I almost have the opposite problem, the image registers as synthetic or manipulated, even when it isn't:
https://www.saildrone.com/news/tropical-atlantic-hurricane-m...
> Researchers have since determined that rogue waves probably claimed 22 supercarriers and more than 500 lives in the second half of the 20th century alone.
https://www.quantamagazine.org/the-grand-unified-theory-of-r...
I'd think that a larger impactor or one that survived further into Earth's atmosphere (and closer to the surface) might have changed that experience markedly. You're informing my own advice-to-self as to how to respond should I see a very large airburst at some point. "Stay away from glass" was already part of that, as well as "expect the shockwave after about 90 seconds". I think I'll add "avoid direct thermal exposure if it looks to be large" to the list.
If you've not already seen the Sandia Labs modelling based on the 1908 Tunguska event, the shockwave dynamics suggest to me why and how the multiple shockwave arrivals at a given point on the ground occur:
https://newsreleases.sandia.gov/releases/2007/asteroid.html
Particularly this simulation: http://www.sandia.gov/videos2007/2007-6514Pfire.hv1.1.mpg
If I'm reading correctly, NOAA is using the smallest of the three current models.
1. https://en.wikipedia.org/wiki/Iridium_satellite_constellatio...
2. https://www.satphonestore.com/tech-browsing/satellite-intern...
The Thales VesseLink modem they used consumes 65W nominal/120W maximum. It offers a connection speed of a couple hundred kbps, so sending up a video file of a fixed size will require it to be on for quite a while - Assuming 200 kbps average, and a 360 MB video, that's 4 hours of uploading or 260 Watt-hours. Also, it's 12x9x2", and weighs 7.5 lbs; this is a boat not a hobby quadcopter. 260 Watt-hours is a lot; that's like 3 laptop batteries, but that's still smaller than the modem itself.
Starlink does consume 100W, but offers a connection speed of about 200 Mbps. The 360 MB video upload could complete in 14.4 seconds, which consumes 100 W * 14.4 seconds / 3600 seconds/hour = 0.4 Watt-hours. It is significantly larger, and it would probably have a harder time handling rough seas (not to mention saltwater intrusion), but that's a lot less power.
Whichever modem you're using, you'd want to turn it on infrequently.
Edit: The Saildrone product brief is here:
https://assets.website-files.com/5beaf972d32c0c1ce1fa1863/61...
It describes a 23' or 7m boat. The 33'/10m larger version has 300W continuous sensor power/2kW peak available from the solar panels, which appear to be of a comparable size to those on the Saildrone.
Maybe force 6 is normal, but this is easily force 10+
Even the fastnet race of 79 was LESS than what we are seeing in this video
The pilot chart for north atlantic in december is showing 20% of days are at a gale in your latitudes, but that's again, a far stretch from the video: https://www.offshoreblue.com/nav/pilot-charts.php
Here's the beaufort scale for reference: https://www.spc.noaa.gov/faq/tornado/beaufort.html
This thing on kman kmax https://gallery.vtol.org/images/2017/08/15/kmaxServoFlap.jpg
[1] https://en.wikipedia.org/wiki/Comet_Shoemaker%E2%80%93Levy_9
Wikipedia has this to say:
> Though the eye is by far the calmest part of the storm, with no wind at the center and typically clear skies, on the ocean it is possibly the most hazardous area. In the eyewall, wind-driven waves all travel in the same direction. In the center of the eye, however, the waves converge from all directions, creating erratic crests that can build on each other to become rogue waves. The maximum height of hurricane waves is unknown, but measurements during Hurricane Ivan when it was a Category 4 hurricane estimated that waves near the eyewall exceeded 40 m (130 ft) from peak to trough.
For a 10mt explosion at 20km height it shows a third degree burn radius of 27km. Chelyabinsk was ~0.5kt at 29km. Larger objects are expected to penetrate further into the atmosphere before exploding: https://en.wikipedia.org/wiki/Meteor_air_burst
I'm not sure how much time you'd have to evaluate size or distance, videos of Chelyabinsk show it pretty bright just a second or two after becoming visible. Length of infrared exposure determines severity of burn, so reacting early is helpful.
https://www.google.com/maps/place/Saildrone/@37.7829877,-122...
(I don't think they have public tours, but I could be wrong)
Usually you can spot the drones in Seaplane Lagoon, and the water nearby.
It will be a life-changing event for maritime robotics, assuming they don't get too greedy.
https://www.researchgate.net/publication/5633081_The_Halifax...
https://scholar.google.com/scholar?q=eye%20surgery%20halifax...
[1] https://acoustics.org/what-can-we-learn-from-breaking-wave-n...
[2] https://journals.ametsoc.org/view/journals/phoc/44/10/jpo-d-...
