Ship tracks over the Pacific Ocean made visible by the clouds that form around the particles in a ship's exhaust

© NASA

Ship tracks over the Pacific Ocean made visible by the clouds that form around the particles in a ship's exhaust

June 25 is the Day of the Seafarer, a global event highlighting how much we rely on the maritime industry. Turns out it’s a whole lot, as ships transport more than 80 per cent of global trade. In honour of this occasion, we’re showing a NASA satellite view of ship tracks over the Pacific. And what are ship tracks, you ask? They’re clouds that form around particles in a ship’s exhaust when it hits the damp ocean air. These clouds often stretch in narrow paths as in this image, reflecting the ships’ course. To the seafarers out there (1.5 million, according to the International Maritime Organisation), we wish you smooth sailing and a good day at sea.