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By day they could develop a very heavy scale of attack on objectives that are within fighter escort range. scale of attack of the order of 100/200 bombers might be carried out in waves throughout the day on such objectives.

NAVAL ACTION.

4.

The

In addition to motor torpedo boat and submarine attacks on warships, attempts may be made to mine or attack with torpedo carrying aircraft our naval forces in their bases. enemy will probably attempt diversions by the operation of submarines or heavy ships to draw our naval forces away from the invasion route. (See paragraph 6 below). Germany is believed to possess some 50 motor torpedo boats.

SABOTAGE.

5.

The most likely objectives for sabotage are:-

Factories, particularly munition and aircraft factories. Dockyards.

Vital points on communications. Facilities for intercommunication,

particularly W/T and R.D.F. Stations.

Broadcasting Stations. Telephone Exchanges.

Attempts may be made to release internees and prisoners of war and to communicate with the enemy forces.

DIVERSIONS.

6.

Attempts will probably be made to divert our naval forces in order to reduce our naval strength in the North Sea area, and objectives will probably be chosen with a view to causing the greatest possible dispersion of force.

7.

Intensive submarine attacks would tend to draw off light naval forces, and attacks by seaborne and/or airborne troops on objectives such as the Shetlands, Faroes, Iceland, would tend to draw off heavier forces.

A major diversion might take the form of an attack on

below).

Ireland (see paragraph

An attack on the North of Scotland or an attempt to seize the Shetlands might be timed to coincide with the main invasion in order to cause further dispersion and confusion.

Scale on which Diversions might be made.

8.

(a) Seaborne. The size of a seaborne expedition from

Norway is limited by shipping and not by man power. At present shipping for the equivalent of one

but division only is reported available in Norway, it would be relatively easy for the Germans to provide more ships.

(b) Airborne. The scale of air attack will be limited by the need to conserve resources for the main attack on Great Britain. A force of 1,000 men, including a proportion of parachutists, may be employed if normal methods of conveying troops by air are used. If gliders are used, the numbers of troops employed may be considerably higher. Prior to the war Germany had no large gliders, but she is known to have used There is no about a dozen in Holland and Belgium. evidence to show how many she has got now but they can be constructed fairly rapidly.

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