GPs

Researchers point out that classical methods of verifying a receiver's position are easy to fool, leaving navigation systems vulnerable to GPS spoofing attacks. Quantum states of light could instead authenticate a receiver's location, offering a cryptographic guarantee that cannot be faked. The catch is practical: the scheme only works if systems are fast enough and optical losses are low enough, which remains the main bottleneck to real-world deployment, according to Physics Today.

The National Audubon Society is reporting on efforts to track an American Oystercatcher using GPS/GSM technology, following the bird's movements after it was lost and then found again. The story highlights how modern tracking devices are helping researchers understand the migratory patterns and habitat use of this coastal shorebird species.

Lifehacker has rounded up the standout Garmin watch discounts available during Amazon's October Prime Day sale, covering fitness and wearable deals across the brand's range. Shoppers are browsing the list to pick up GPS running watches and smartwatches at reduced prices during the limited-time shopping event.

GIM International is reporting on new approaches to building urban digital twins in GNSS-denied environments, where satellite navigation signals are blocked or unavailable. The piece covers how cities can be mapped and modelled digitally despite the absence of reliable GPS signals, a challenge in dense urban areas and other difficult conditions.

DC Rainmaker has published a running tracker of discounts on sports technology during Amazon's Prime Big Deals Days event, covering devices such as GPS watches, cycling computers and fitness gadgets. Shoppers are using it to compare prices across the sale period and decide whether the current offers represent genuine savings or routine discounting.

Garmin has introduced the Enduro 4, a GPS smartwatch aimed at endurance athletes. The headline feature is battery life, with up to 320 hours in activity mode and up to 90 days of regular smartwatch use. Solar charging is also part of the package, and early reactions online are focusing mainly on the battery figures.