The exercise of carrying out jet V/STOL operations in any given combination of weather and site conditions is clearly open to theoretical analysis and relatively simple solution, along the existing lines of conventional autoland. With present knowledge automatic operation of a jet V/STOL aircraft would not be a very great task, providing that things such as cost, reliability, space, weight, ground equipment, in fact the overall economics of the operation were not allowed to intrude into the problem. But this is not reasonable, the advantages of automatic operation must be weighed against the cost.