How to stop evasive action

[MLF]

Does anyone know of a way to stop ships acting evasively when they get near another ship. I am trying to add moving traffic to a port (St Nazaire of course ) but way points are not followed as the moving ship tries to "avoid" another ship that is docked. It would be good if this were possible on a ship by ship basis rather than to all ships. Any ideas or links to other threads would be welcomed.

Thanks

MLF