If there is a monolith on a tile next to the ocean, you can send a seaformer to an ocean square next to the monolith to lower the elevation. This will turn the monolith square into an ocean square but the monolith will not go away. You can then run ships and Isles of the Deep onto the monolith and get an upgrade and/or repair damage. As with land units, you only get one upgrade per unit and transports don't upgrade. If you have units on the ship/Isle, when they're in the monolith square you can select each unit and it will be upgraded/repaired as well.
The cost for lowering the elevation can be as much as 288 EU, but I think it's money well spent.
I haven't found any way to upgrade air units, however.
The cost for lowering the elevation can be as much as 288 EU, but I think it's money well spent.
I haven't found any way to upgrade air units, however.
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