Re: [Starlink] starlink at sea

[Ulrich Speidel <u.speidel@auckland.ac.nz>]

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Given where the author of the blog was, most of the latency would have 
been from the space segment - the 20 ms are only realistic if the 
satellite that Dishy talks to can downlink to a ground station within a 
few 100 km. If the laser ISLs are involved, the path is usually much 
longer (and the transfer points into and out of the Internet proper 
aren't always the closest or most obvious ground stations either. We see 
traceroutes from Tarawa pass through Auckland, regardless of target, 
despite there being closer ground stations in Australia, for example.

It'd be also interesting to see where cruise ships have which 
experience. Antarctica does well because the ship and therefore user 
density is low, and there is little competition for the ISLs. Similarly, 
ships in moderate latitudes below the mid-50's now typically see a lot 
of satellites that they can use, and as long as they don't all crowd in 
large numbers into a single harbour, they should generally be fine. The 
crunch point will be when you get high concentrations of large ships in 
northern locations - Norway, Svalbard and Alaska / Inside Passage at 
this time of year come to mind. That's where low visible capacity meets 
high user density.

I also wonder how much of a role demographics play. My only trip on a 
cruise ship to date is a story in its own right, but at the time I 
couldn't help but notice that I was 30-40 years younger than the age 
average on board. So quite how many gamers / streamers there'd be among 
the digital migrants aboard would have been questionable. But then 
again, that was some time ago, and I'm sure there'd be a few digital 
natives now. Certainly, there will be in future. So how will that impact 
on demand and the ability to accommodate the growth in demand?

On 3/07/2024 8:40 am, Dave Taht via Starlink wrote:
>
> https://circleid.com/posts/20240501-starlink-service-is-great-on-some-cruise-ships
>
> -- 
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> Dave Täht CSO, LibreQos
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-- 
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Dr. Ulrich Speidel

School of Computer Science

Room 303S.594 (City Campus)

The University of Auckland
u.speidel@auckland.ac.nz  
http://www.cs.auckland.ac.nz/~ulrich/
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