Plans for the mounting of long-range guns in the Calais-Boulogne area which may be used to cover a landing in the Dover area are unlikely.
It lays, correctly, emphasis on the use of long-range artillery and minefields to cover the crossing of the Channel in its narrowest part.
The committee recommended that a sharp look-out be kept for these guns
Armed forces High Command
WFA/Abt. L Nr. 33137/40 g.K.Chefs.
Berlin, 10 July 1940
Re: Artillery protection for transports to Britain.
In pursuance of the requested analysis of artillery protection for transports to Britain (OKW/WFA/ Abt. L Nr. 33 124/40 g.K.Chefs. Paragraph 2.b), the Führer has ordered:
All preparations are to be made to provide strong frontal and flank artillery protection for the transportation and landing of troops in case of a possible crossing from the coastal strip Calais-Cap Gris Nex - Boulogne. All suitable available heavy batteries are to be employed for this purpose of the Naval High Command and are to be installed in fixed positions in conjunction with the Todt Organization.
The Commander in Chief, Air will assume responsibility for protection against air attacks upon batteries under construction or already built. He will see to it that the antiaircraft batteries assigned to this area, insofar as their position will permit, can also be employed for defence against targets at sea.
Arrangements for coordinated fire control will be in the hands of the Commander in Chief, Navy, who is to report at an early date concerning the state and probable duration of preparations.
The duties assigned to the Army High Command in Paragraph 2b of the above order are cancelled.
Chief of Staff, Armed Forces High Command
If the results of air warfare are unsatisfactory invasion preparations will be stopped.
First of all, success is to be achieved within the target areas of Luftflotten 2 and 3. Only a complete victory over the RAF in southern England can give us the possibility of further attacks on enemy forces stationed in the depth of the country.
[Hitler] admitted that the invasion of England would be an extremely daring enterprise. He agreed that we could not expect to effect a surprise landing, and that we would be facing a most resolute opponent who controlled the water area we had to cross. Also he conceded that to keep the invasion force of approximately 40 divisions supplied after they had landed would present the utmost difficulty. An absolute prerequisite for the whole operation would be the complete supremacy in the air and an effective minefield protection along both flanks of the crossing channel, plus the added protection of a barrage from heavy guns installed on the French side of the Straights of Dover. He concluded by saying that owing to the lateness of the seasons, the main operation would have to be completed by 16 September, and therefore if all preparations had not been completed in time for the landing to begin by the first of September, then other plans would have to be considered.
The Kreigsmarine assess it has to assemble:
All the steamers, barges, lighters, tugs and even motorboats and fishing craft operating on Germany's inland waters as well as out of the seaports themselves. These would additionally need converting to transport troops.
30,000 mines, depth charges, and other material for sealing off the amphibious area.
Mount several heavy coastal batteries at Cape Griz-Nez and other points on the French coast opposite Dover.
Long range guns firing across the channel hit several houses in Folkestone and Dover killing and maiming civilians. Hawkinge airfield is also hit.
This is a preparatory shelling - testing and ranging the guns.