I predict a new class of funnies: https://en.wikipedia.org/wiki/Hobart%27s_Funnies https://en.wikipedia.org/wiki/Hobart%27s_Funnies This time, drones, capable

I predict a new class of funnies: https://en.wikipedia.org/wiki/Hobart%27s_Funnies https://en.wikipedia.org/wiki/Hobart%27s_Funnies This time, drones, capable of doing silent, fast river crossings and scouting. Maybe one day even bridge building. The us and sovjets had drifting ice stations. https://en.wikipedia.org/wiki/Project_COLDFEET https://en.wikipedia.org/wiki/Project_COLDFEET It could be feasable, to have a sort of drone, that is nothing but a subermsible tank of cooling gas and a airmatress like enclosure in which to freeze water. Add carbon fibres to the container, and you get something that makes for a nice add hoc ponton, without the concrete and transport time.