A computer-implemented method (100, 200) of coordinating dissimilar operations of at least one of oil and gas exploration, oil and gas drilling and oil and gas production conducted by a plurality of dissimilar marine operators (30a-d) in a same marine field, the method comprising the following steps: a) with a network system (10, 110) comprising a host service, a plurality of networked devices and a plurality of planning tools, each networked device of the plurality of networked device of the plurality of networked devices being at a respective dissimilar marine operator of the plurality of dissimilar marine operators, each planning tool of the plurality of planning tools being at a respective networked device of the plurality of networked devices, obtaining, by the host service using communication equipment (28, 38, 48, 80, 111, 112), operational information from each planning tool of the plurality of planning tools the operational information associated with the dissimilar operations conducted by the dissimilar marine operators (30a-d) in the same marine field; b) structuring by the host service, the obtained operational information; c) determining by the host service or by each planning tool of the plurality of planning tools, associations (85, 87) between the structured operational information for the dissimilar marine operators (30a-d), wherein the determined associations (85, 87) comprise linkages (234, 240) and conflicts between the structured operational information, wherein, in a linkage, a task of a dissimilar marine operator coincides in time with a task of another dissimilar marine operator in order to make the dissimilar operations more efficient or to conserve time or space in the marine field and conflicts being one or more of a task, position, and time details involved in one dissimilar marine operator's operational plan which occur in an incompatible fashion with the operational plans of one or more other dissimilar marine operators 30; d) sharing (225, 232, 244, 254) with the network system (10, 110), with the communication equipment (28, 38, 48, 118), the structured operational information and determined associations (85, 87) with each of planning tool of the plurality of planning tools; e) generating at each planning tool of the plurality of planning tools visual and temporal representations of the dissimilar operations in past, present and future time periods to allow for visual display on a user interface of each planning tool of the plurality of planning tools the visual and temporal representations dependent on the structured operational information and the determined associations; and f) performing, by at least two of the dissimilar marine operators, at least two respective operations of the dissimilar operations as defined by at least one of the linkages. a) with a network system (10, 110) comprising a host service, a plurality of networked devices and a plurality of planning tools, each networked device of the plurality of networked device of the plurality of networked devices being at a respective dissimilar marine operator of the plurality of dissimilar marine operators, each planning tool of the plurality of planning tools being at a respective networked device of the plurality of networked devices, obtaining, by the host service using communication equipment (28, 38, 48, 80, 111, 112), operational information from each planning tool of the plurality of planning tools the operational information associated with the dissimilar operations conducted by the dissimilar marine operators (30a-d) in the same marine field; b) structuring by the host service, the obtained operational information; c) determining by the host service or by each planning tool of the plurality of planning tools, associations (85, 87) between the structured operational information for the dissimilar marine operators (30a-d), wherein the determined associations (85, 87) comprise linkages (234, 240) and conflicts between the structured operational information, wherein, in a linkage, a task of a dissimilar marine operator coincides in time with a task of another dissimilar marine operator in order to make the dissimilar operations more efficient or to conserve time or space in the marine field and conflicts being one or more of a task, position, and time details involved in one dissimilar marine operator's operational plan which occur in an incompatible fashion with the operational plans of one or more other dissimilar marine operators 30; d) sharing (225, 232, 244, 254) with the network system (10, 110), with the communication equipment (28, 38, 48, 118), the structured operational information and determined associations (85, 87) with each of planning tool of the plurality of planning tools; e) generating at each planning tool of the plurality of planning tools visual and temporal representations of the dissimilar operations in past, present and future time periods to allow for visual display on a user interface of each planning tool of the plurality of planning tools the visual and temporal representations dependent on the structured operational information and the determined associations; and f) performing, by at least two of the dissimilar marine operators, at least two respective operations of the dissimilar operations as defined by at least one of the linkages.