In this area, Global Fishing Watch received AIS messages from several vessels (only two shown). Grey ovals show where a neural net classifier identified pair trawlers. Related: Photos of Earth by Planet satellitesĪ satellite image of pair trawlers in North Korean waters. The researchers analyzed wide-field photos captured by Planet's shoebox-sized Dove cubesats, as well as targeted imagery from larger, sharper-eyed SkySats. The team also looked at optical imagery gathered by Earth-observing satellites operated by San Francisco-based company Planet. But many ships don't beam out AIS signals, and the ones operating illegally are very unlikely to do so. AIS signals stream continuously from transponders on ships, and these signals are often detected via satellite. So the researchers got a bird's-eye view, studying the region using four different types of satellite information.įor example, the researchers pored through Automatic Identification System (AIS) data, which is designed to help ships keep tabs on traffic in their area and avoid collisions. Many of the vessels plying these waters are dark, meaning they don't publicly broadcast their positions and don't show up in monitoring databases.
Park and his colleagues tracked fishing activity in the Pacific around the Koreas, Japan and Russia, a big patch of poorly monitored ocean.
Motorcycles: $11 when purchased at state parks, most DNR customer service centers or at the Secretary of State outside your license plate registration renewal cycle.Motorcycles: $6 when purchased at time of your license plate registration renewal through the Secretary of State.(passport fee + $5 convenience fee = $17). Vehicles: $17 when purchased at state parks, most DNR customer service centers or at the Secretary of State outside your license plate registration renewal cycle.Vehicles: $12 when purchased at time of license plate registration renewal through the Secretary of State.The passport is valid for one year and/or until your license plate registration expires. When purchased at a different time, you'll receive a sticker that must be permanently affixed to the lower passenger-side windshield.
When purchased at the time of license plate registration renewal, your license plate tab will have two tiny "P"s.