Routing Points are listed in a grid style control and can either be listed alphabetically or grouped within a number of categories. The check box column indicates whether the Routing Option is in use or a Routing Point is Open (checked) or Closed (unchecked).

An 'Open' Routing Point can be used when a route and distance is calculated, if 'Closed' then an alternative route will be calculated avoiding that point if possible.

Routing options when altered are applied to the destination port.

If a specific port, other than the first port, is selected within the ports list, the routing options are set for that selected port.

If only two ports are included with the list, changes to routing options are always applied to the destination port if neither port is selected.

If no port is selected, routing options are applied to all ports if the list if permitted by the relevant System Option.

If no port is selected and the System Options do not permit routing to be applied to all ports, then the changes to the routing have no immediate impact but those routing options will be applied to the next port added to or insert within the voyage.

The control is described in more detail in the Routing Control help topic.