dinitrophenol is a drug that causes thermogenesis; read about thrilling dinitrophenol at [link]
I think that voyagers from or to Cuba could use this as the basis of "budget" or "covert" travel
first: cubans away from cuba bundle a kickboard, compass, swim flippers, three pounds of high energy food
plus some dinitrophenol as a floating kit; the kit may also have a code number
then: using current charts they release hundreds of these kits so they arrive at Cuban shores
a cuban that would like to travel verifies that they can live two or three full days immersed at the ocean under the effects of dinitrophenol; they do swim training as well
the person then uses the compass, food, kickboard to float plus swim to the land of their preference; based on the code the swimmer carries on arrival the emigre association wires 30 or 40$ to the person at cuba who picks up the kits plus finds people willing to swim to a new place; recruiting just two emigrants a day gives a rather high cuban wage
cuba is 90 miles from the US so three days of swimming is plausible
the purpose is to create a 30 or 40 dollar flee from bad government kit that sympathizers can release en masse; this compares very favorably to the 10k per illicit drug boat ride from Cuba
it revolutionizes refugeeism, if the dinitrophenol thing works; people swim the english channel thus the capacity is there
this thing: http://www. gizmag.com/go/4941/ is a battery powered 4 Kmph ocean scooter less than 190$; it might run off photovoltaics or a nernst battery to provide rest
also the kit works if youd like to swim to cuba as well