Hi Tarbat I`m also using Mercator, its a bit like when you transition Google Earth to Street view the map seems to fold over, it only happens on the central London section so I`m not to bothered.I live just over a Nm north of Blackwall Reach on the river Thames so I`m mostly zooming in to the many small docks and piers that the small coasters pull in to,at the moment I`ve got 74 targets on screen