(b) Photographic reconnaissances of the Baltic ports Danzig, Gdynia, Rostock, Flensburg, Stettin, Swinemunde, Lubeck and Neustadt: and the ports of Toulon, Spezzia and Genoa when possible. (c) Photographic reconnaissances of all likely and suspected enemy ship-building yards once a week. (ii) Army. (In order of priority). (a) Hinterland of the Invasion Ports. The interval of time between these reconnaissances will depend on the results obtained. (b) Franco-Spanish Frontier. One photographic reconnaissance of this area was carried out on 17th March, 1941.