[Milsurplus] SIGNAL CORPS INDICATOR UNIT I-152-AM

[D C *Mac* Macdonald]

I'm not sure, but I think the SCR-718 was the radio 
altimeter in the T-29s I flew in at Navigator School 
out of Harlingen AFB, TX back in 1961-1962.  We
used it for "Pressure Pattern Navigation" when over
the Gulf of Mexico on training missions.  In the gulf 
we were too far south for that procedure to be very
accurate.  It is a method of air navigation that is
only marginally effective at best between 30 and 60
degrees of latitude. 
 
We generally flew at altitudes of 6.5k to 8.5k feet 
above MSL. 


Mac, K2GKK/5
USAF, retired



> Date: Sat, 19 Apr 2008 12:56:36 -0400
> From: jfor at quik.com
> To: wh7hg.hi at gmail.com
> Subject: Re: [Milsurplus] SIGNAL CORPS INDICATOR UNIT I-152-AM
> CC: milsurplus at mailman.qth.net
>
> The indicators are totally different. The APN-1 is a 270 deg. analog meter.
> The SCR-718 is a radial scan CRT.
>
> http://www.history.navy.mil/library/online/radar-12.htm
> http://www.vk2bv.org/museum/apn1.htm
>
> -John
>
>
>
> Michael Tauson wrote:
>
>> On Sat, Apr 19, 2008 at 5:23 AM, J Forster  wrote:
>>
>>> They serve roughly the same function (measuring altitude above terrain)
>>> and use roughly the same frequencies (400 to 500 MHz) but are otherwise
>>> totally different.
>>
>> Uh, yeah. The "serving the same function" part was what was germaine.
>> The modes are different, TX output powers are different and a whole
>> bunch of other things are different. They also worked in the same
>> portion of the spectrum as the APS-13 "Tail End Charlie" radar, the
>> ABA (SCR-515) and a few other sets.
>>
>> Michael
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net