During world war 2 the united states engaged in a lend lease program with other nations. what was this program?

The Lend-Lease policy was a program implemented by the US in 1941 with the aim of defeating Germany, Japan and Italy by initiating the distribution of food, oil and other materials, that lasted until August 1945. It also included weaponry, warships and warplanes.

The help was sent to Great Britain, China, free France, also to the Soviet Union when they started their participation in the war, and other allied countries. This aid was free for all the allied nations. In turn, the US earned leases on army and naval basis totally free of charge, in the territories of the allied countries during the war, plus the provision of local supplies,  

the captain of a steam ship naturally chooses the shortest route to his destination. since a sailing ship is usually pushed by winds and currents, its captain must find a route where the wind will probably blow in the right direction. tacking, i.e. using contrary wind to pull (sic) the sails, was always possible but wasted time because of the zigzagging required, and this would significantly delay long voyages. the early european explorers were not only looking for new lands. they also had to discover the pattern of winds and currents that would carry them where they wanted to go. during the age of sail winds and currents determined trade routes and therefore influenced european imperialism and modern political geography. for an outline to the main wind systems see global wind patterns.

pilotage or cabotage, in one sense, is the art of sailing along the coast using known landmarks. navigation, in one sense, is the art of sailing long distances out of sight of land.[1] although the polynesians were able to sail the pacific (with great difficulty) and people regularly sailed north and south across the mediterranean, before the time of columbus nearly all sailing was coastal pilotage

        it is some were in here? ///

i think its the outcome of people's preferences.