Erm er it's basically that there is no stated requirement at present from any of the four nations, for this aircraft to operate on ships  er back in the early days of the programme when the the French were involved  er we looked at the possibility of designing an aircraft er to provide the whole spectrum of capabilities from air defence  er ground attack and also maritime operations off ships  and er we we certainly experienced some difficulties in reconciling all those things in one design, which was adequately capable in each of the areas.