An anonymous reader shares a report: Next time you try to wipe a smudge off your iPhone screen, take a closer look. See if you can spot one of the two tiny QR codes etched into its glass. Chances are you won’t be able to find them. Both codes are tiny — one is the size of a grain of sand and can only be seen with special equipment, while the other, roughly the size of the tip of a crayon, is laser-printed on the reverse side of the glass somewhere along its black border or bezel. The codes are placed on the glass at different stages of manufacturing to help Apple track and reduce defects. They represent the company’s obsessive attention to detail in manufacturing devices such as the iPhone, which has helped it squeeze costs in a traditionally low-margin business.

“Apple has been granularly and singularly tracking many components in the iPhone for some time, but expanding that to the glass and doing it with a microscopic bar code is another level of obsessive attention to detail that few companies would do,” said Kyle Wiens, CEO of iFixit, a popular Apple gadget repair site. “I’ve never heard of serial numbers on the glass level, but if you’re throwing infinite money at improving your manufacturing knowledge, then why not?” Apple added the smaller of the two QR codes — 0.2 mm in width — to iPhone screens in 2020 so it can track precisely how many usable cover glass units its two Chinese suppliers, Lens Technology and Biel Crystal, are making and how many defective cover glass units they are throwing away during manufacturing. Lens and Biel have previously stymied Apple’s efforts to learn the true rate of defects, which can raise its production costs. Apple has paid millions of dollars to install laser and scanning equipment at Lens and Biel factories to both add the microscopic QR code and scan the cover glass at the end of the production process.

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Source: Slashdot – A Hidden Bar Code in iPhone Screens Saved Apple Hundreds of Millions of Dollars

Japan’s Transport Safety Board on Thursday judged that a cargo ship that spilled 1,000 tons of fuel oil into a pristine marine environment off the coast of Mauritius in 2020 was travelling off course in search of a cell phone signal. From a report: The MV Wakashio was en route from Lianyungang, China to a Brazilian port when, on July 25 2020, it struck trouble near Blue Bay Marine Park, a popular snorkeling spot on the Indian Ocean nation Mauritius. The Japanese-owned vessel was sailing under a Panamanian flag of convenience, and captained by a Indian national. According to the report, two days before it ran aground, the captain changed the 100,000-plus ton ship’s route to travel five nautical miles from the coast line instead of the originally planned 22 nautical miles. He ordered the course change without obtaining proper marine charts of the area and therefore did not know that waters in the area are less than 20 meters deep.

The ship subsequently hit a coral reef. “Reefs and obstacles were displayed near the place of occurrence,” reads the 89-page Japan Transport Safety Board report in Japanese. “The body buckled due to being knocked to the seabed and broke into the skin near the fuel oil tank. As a result, about 1,000 tons of fuel oil loaded in the tank spilled out to sea,” the document states. The report noted that the captain of the vessel changed the voyage plan for the purpose of coming within range of signal for his smartphone. It also noted the behavior was not an isolated incident and that safety awareness among the crew at large was lacking.

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Source: Slashdot – Search For Phone Signal Caused Oil Spill, Say Japanese Investigators