needed. I noticed here that some people want two-second signals and this sort of thing. Rather than say they just don't exist, I say just ask Bob for what you want; if a whole group of people come up wanting a two-second signal, I'm sure we can get a two-second signal somehow. If one fellow wants one, we'll get together with him to discuss how to get his two-second signal or what to substitute for it. There will have to be more radio signals, particularly on Cherokee shot on all this effects instrumentation up through that area. Radios, properly used, have been completely reliable; but it takes dry running and this I know is pretty rough for a fellow who's got a little station out on a reef somewhere with a sequence timer going every hour on the hour, as I understand Al's schedule is going to require. There are going to be problems, but I think no one need have fears for radio time signals if they will just dry run and practice. This means getting out there early; for people who arrive the last week, the failure rate is pretty high. We also will supply communications, which is essentially a function of the timing system; at least, it grew out of that. We will run Motorola nets for the technical people. If you have such a requirement, you should get this in so that Roberts can sort out how many nets, how many radios on a net, and this type of thing. The confusion of the last couple operations during the last month over who wants a countdown gete everybody upset. I think that if you have such a requirement, you should put it in now. It's not always easy, in the last minute, to bust into an AF transmitter and give him a countdown on the right audio level so that the airplanes can get intelligent reception and will have a chance to work out antenna probiems and that sort of thing. Rather than make private deals with EG&G, put your requirements on your status reports so that the distribution can see your problems. We guarantee only one post-shot timing signal and that's a one-second signal when the other signals cut off. The reason for this is simply that in a station close by you can't guarantee that a relay is going to hold in through a shock wave. We have given over the radio five-second "beeps" for two hours and stuff like that. We will have radios going through zero time, for the benefit of those who are worried about this, and we can minimize this if we know beforehand and put in provisions to cut them off. It has to be done automatically, to do it satisfactorily. We would expect to be running on the order of a dozen frequencies and powers up to 250 watts mostly in the 150 mc band. However, if we get into this television monitoring of photographic links, there will also be some higher frequencies. For the benefit of the J-Division people, we will probably have about 150 people involved but these will probably not exceed 90 or 95 in the FA at any one time. - 68 « rer a 2 rr F it a i