It's been so long since I played with the editor I had to rely on the manual..
3.4.1 Oil Rig
The Oil Rig object type has been switched from a “land based” object to a “surface ship.” This has been done to allow missiles to home in on it. The oil rig is now found under Surface Ships—Civilian in the mission editor. Scenario designers should place the oil rig in a 0-wind and 0-current region to prevent it from drifting. Do not neglect to set maximum altitude and depth for the wind/current regions; failing to do so will make the region null and subject to random wind/current.
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