3 26th June, 1940. Norden Bomb Sight* The Germans have recently altered their long-range bombing tactics and are now adopting high altitude bombing with such good results as to indicate they have a bomb sigrt similar to the Norden. Indeed we suspect drawings of the Norden left on the Bremen in September. We are therefore all the more anxious to improve the accuracy of our own bombing. We ourselves have now developed and produced a bomb sight which gives results equivalent to or even better than those claimed for the Norden sight, unfortunately our production of these sights is disappointingly slow. Providing that we can demonstrate to the U.S. Air Attache1, or any expert named^ that our sight is the equal of the Norden, would it not now be possible for U.S. Administration to release some of the latter? Failing this, would the Administration authorise the release or production of the stabilising element upon which we could mount some form of existing sight? This stabilising element is an extremely important part of any bomb sight - not only the Norden - and in asking for it we cannot be accused of assuming that we will get the Norden. There may possibly be some Norden models that are out of date or superceded, which, whilst not as good as the latest designs, are still infinitely better than any unstabilised sights. Whilse we fully recognise the importance of keeping details of the sight out of the hands of the enemy, more especially in view of our naval preponderance, we appear to be in the position of being unable to obtain a sight which is as good as the one the Germans use against us for fear that they may discover its design. In any case the production, even when the design is known, is a lengthy matter as - 2 - we know to our cost, and with the turn the war has taken, it seems of little consequence whether the enemy at this late date attempts to adopt a new design*