FILE PHOTO: A rainbow is seen over the container ship 'Maersk Genoa' as it sails off the northern coast of Tunisia in the central Mediterranean December 1, 2018. REUTERS/Darrin Zammit Lupi/File Photo
At noon every day – when the sun is directly overhead – the world’s fleet of commercial maritime ships report their position, speed and weather conditions.
It’s the primary way ships track how much fuel they’re burning and how to use less of it, and they’ve been doing it this way for at least 200 years.
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