i don't see how or why people hadnt thought of it before... looking through all the threads i saw that no one was able to create a unit able to traverse both land and see without making it buggy... then i found this.
<bCanMoveAllTerrain>1</bCanMoveAllTerrain>
and then set your unit to what you don't want it to be able to traverse
<TerrainImpassables>
<TerrainImpassable>
<TerrainType>TERRAIN_OCEAN</TerrainType>
<bTerrainImpassable>1</bTerrainImpassable>
</TerrainImpassable>
<TerrainImpassable>
<TerrainType>TERRAIN_PEAK</TerrainType>
<bTerrainImpassable>1</bTerrainImpassable>
</TerrainImpassable>
</TerrainImpassables>
<FeatureImpassables>
<FeatureImpassable>
<FeatureType>FEATURE_JUNGLE</FeatureType>
<bFeatureImpassable>1</bFeatureImpassable>
</FeatureImpassable>
<FeatureImpassable>
<FeatureType>FEATURE_FOREST</FeatureType>
<bFeatureImpassable>1</bFeatureImpassable>
</FeatureImpassable>
</FeatureImpassables>

Well, helicopters in Rise of Mankind have been already using this method - they only can't enter ocean. ;)

...but Helis shouldnt end a turn on coastal tiles now should they?:rolleyes:

No, but we don't have such thing as fuel which would limit unit movement.. with the basic BtS xml tags it's impossible to make helicopters which would require to end their turn in city /carrier or be destroyed at the end of turn. I miss this feature from Civ 3. :(

you could always attempt to infuse Unit Fuel Mod w/ RoM, or as an addon to Rev, but i tried it once, and none of my units could move since i had no fuel even though those units didnt need fuel :lol: