Even smaller ships could be made Harrier-compatible using British Aerospace's (BAel computer-controlled 'Sky hook' crane launch and recovery system. Further development of the Harrier line will almost certainly lead to a supersonic V/STOL fighter by the end of the century, although it will probably come from St Louis, Missouri rather than from the Harrier's Kingston upon Thames birthplace. While such a type's design will probably have relatively little in common with the current aircraft, it will certainly benefit from the 20 years' V/STOL service experience of the Harrier and Harrier II.