A networked system shares operational information (tasks, positions, times, etc.) between dissimilar operators performing dissimilar operations in a same marine field. The shared information include associations (linkages and conflicts) that allows each operator to optimize its operations and complete tasks in a more efficient manner. As part of this system, a planning tool having a graphical user interface can be used to visualize plans at an operator (and nearby operators). Changes made to plans by one operator are shared with other operators via the system and illustrated in the interface at the other operators, thereby allowing the other operators to make their own respective operational changes in response.