I have a HB859 on the bow and a HB899 on the console of my boat. They are ether netted together. I have noticed that if I don't have both units on, a lot of the waypoints that were marked on the 899 do not show up on the 859. If I turn on the 899, the waypoints will suddenly appear on the 859. Is this the way they are supposed to work?

How should I get the missing waypoints loaded into the 859 so I don;t have to run the 899 all the time?

Also, do both units have to be turned on for newly marked waypoints to show up on both units at the time I hit the "mark" button?