Sierpe River (Spanish: "Rio Sierpe") is a river of Costa Rica. Boat traffic is common with both locals and tourists. A broad range of wildlife can be seen from the American Crocodile, various other reptile species, and exotic fish and birds. It joins the Rio Terraba.
the locals love to move around on water vehicles
The scenario states that the locals (and tourists) like to use boats. Boats are a form of water vehicle. The model probably couldn't tell that they were the same.