https://www.cruisersforum.com/forums/ Float your tall tales, fish stories and general topics related to cruising that don’t fit elsewhere. Political comments, discussions of general government policy, weaponry, religious and social issues are considered jetsam and should be offloaded to other social media sites; they are off-limits in this forum. en Thu, 11 Jun 2026 03:24:32 GMT vBulletin 60 https://www.cruisersforum.com/forums/images/misc/rss.jpg https://www.cruisersforum.com/forums/ https://www.cruisersforum.com/forums/f80/yachtworld-and-boats-com-updates-300453.html Thu, 28 May 2026 21:57:02 GMT Has anyone else here noticed the lamentable "facelift" that these websites have undergone lately? They seem to be experimenting with redoing the aesthetics and function of the sites, with major changes to the way results are searchable and displayed and not for the better.


If anyone here is involved, please take note of this feedback. If you want to alienate your users and drive them to other platforms, please continue in this regard. ]]> Woody https://www.cruisersforum.com/forums/f80/yachtworld-and-boats-com-updates-300453.html https://www.cruisersforum.com/forums/f80/why-coral-reefs-don-t-look-like-they-used-to-300443.html Thu, 28 May 2026 12:23:07 GMT *Why coral reefs don’t look like they used to* If you’ve ever watched old ocean documentaries, and wondered why reefs don’t look that colourful... Why coral reefs don’t look like they used to
If you’ve ever watched old ocean documentaries, and wondered why reefs don’t look that colourful anymore, you’re not alone.
Much of what we remember was filmed with powerful artificial lights, careful editing, and expensive cinema cameras, that made colours explode on screen.
In natural light, water rapidly absorbs longer wavelengths of sunlight, completely filtering out [first] red, orange, and yellow light, within the first 15 to 30 feet, leaving reefs looking far more muted, to the naked eye.
That doesn’t mean reefs aren’t under threat; but, it does mean our expectations were shaped, by highly enhanced footage.

“What happens to light as it travels down through the depths of the ocean?”
➥ https://oceanexplorer.noaa.gov/wp-content/uploads/2025/04/light-and-color-fact-sheet.pdf

“Lighting Fundamentals” [Under Water Photography Guide]
This section covers loss of colour underwater, colour compensation that your brain does, understanding colour temperature, and reflected light.
➥ https://www.uwphotographyguide.com/b...-fundamentals/ ]]> GordMay https://www.cruisersforum.com/forums/f80/why-coral-reefs-don-t-look-like-they-used-to-300443.html https://www.cruisersforum.com/forums/f80/the-oceans-are-getting-darker-300436.html Thu, 28 May 2026 08:01:45 GMT New research [1], from the University of Plymouth, found that: between 2003 and 2022, 21% of the global ocean [an area spanning more than 75 million square kilometres], including massive areas of coastal regions, and open ocean, have become darker, suggesting it could have a potentially profound impact on marine life.

In addition to this, more than 9% of the ocean [an area of more than 32 million square kilometres] had seen photic zone depths reduce by more than 50 metres, while 2.6% saw the photic zone reduce by more than 100 metres.

Ocean darkening occurs when changes in the optical properties of the ocean reduce the depth of its photic zones, home to 90% of all marine life, and places where sunlight, and moonlight, drive ecological interactions.

But, around 10% of the ocean [more than 37 million square kilometres]; including much of the English Channel, and regions stretching from the north of Scotland, to the Orkney and SHetland Islands; has actually become lighter, over the last 20 years.

The new study [1] combined satellite data, and numerical modelling, to analyse the annual changes in the depth of photic zones, all over the planet.

More about:
“Explainer: Why Are the World’s Oceans Getting Darker?”
➥ https://earth.org/explainer-why-are-the-worlds-oceans-getting-darker/

[1] “Darkening of the Global Ocean” ~ by Thomas W. Davies, & Tim Smyth
➥ https://onlinelibrary.wiley.com/doi/10.1111/gcb.70227 ]]> GordMay https://www.cruisersforum.com/forums/f80/the-oceans-are-getting-darker-300436.html