Thank you all for your answers.
Is solved, everything is to edit the INI file the terrain and add the line "WaterMap = XXXXXXX_Water.bmp, where XXXXXX is the name of the terrain.
Of course, the map must have the appropriate XXXXX_Water.bmp file in the folder of the terrain.
Greetings
Dear MigBuster:
I have the entire series expansions and the latest update.
With the mission editor can only be made anti-ship missions in some terrains in SF2E. In others as SF2I not. I have to be modified to have anti-ship missions in all terrains?
Greetings