Virtual Buoys is an iOS app that you can use to navigate from location to location. It is designed specifically to be used during the MR340, but can also be used during other races or events where navigation from one point directly to another point is possible.
When you kayak or canoe on the Missouri River, you avoid the red and green buoys. Heading downstream on the Missouri River, red buoys are supposed to mark the left side of the channel and green buoys are supposed to mark the right side of the channel. Because of river conditions, these buoys can move to spots different than their intended locations.
Then there are the virtual buoys that the Virtual Buoys app was created to follow. You won’t see them in the river, and they cannot cause you to capsize. They are distinct points in the river that define the center of the channel. It’s a little like playing connect the dots. If you paddle from one point to the next point, you should be very close to the channel center at all times. Each virtual buoy has a latitude and longitude that defines its exact position.
River Navigation Software 