underwater car ... uses an idea used on M38 50 years ago ...

[yjcanibul]

saw this on tv,   the old M38 use to use pressure via a dash mounted switch to stop water
entering the axles etc, this car has two divers tanks mounted in back  -  some of the air is
diverted to the electronics box to keep air from entering ...

http://videos.howstuffworks.com/reuters/4296-underwater-car-video.htm

[Giffer]

AWSOME

[yjcanibul]

maybe jeeps of the future will have this as an option ... snorkel = obsolete