Apollo II Loran C Manual

Apollo II Loran C Manual

<HTML>I recently purchased a 172K which has an Apollo Loran C installed. I know nothing about a Loran. I have learned to turn it on and watch some lights flash. I'd sure like to know if anyone has any idea where I can get an instruction book, video etc. Naturally, I'm prepared to pay a reasonable charge.

Any help would be appreciated.</HTML>

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Re: Apollo II Loran C Manual

<HTML>When posting this kind of search/request, it might be helpful to include details such as the exact model, make, of radio you're referring to.  I personally have some old manuals I'd might be able to help with if I knew exactly what you're looking for.
  The bottom line answer however, is to contact your favorite avionics dealer.  He should have what you want, or be able to obtain it for you.
  Lacking that, contact www.easternavionics.com www.avionics.com or another avionics dealer on the net.
  You should realize that Loran is an excellent system, whose early demise has been greatly exaggerated.  Loran will be around long after the VOR system has been shut down.  Reason?  It's more accurate, it's more widely used, and it is used for industrial purposes other than navigation.
It's more accurate:  VOR is most accurate within short distances of the transmitter site.  The farther one is from the transmitter, the less accuracy the system exhibits.  This is due to the "radial" or azimuth method of display of informaton.  Even "digital" displays are actually analog data that are converted to incremental display of numerical digits, not true digital information.  One degree of position at 75 n.m. is over 2 miles of potential error.  Loran is accurate to within 100 meters over all range of distances out to thousands of miles.
  It's more widely used.  VOR is used almost exclusively by aircraft.  (And even then, not ALL aircraft use VOR!)  Loran is used by Aircraft, Marine, and Land-based navigation-system users, as well as industry for timing purposes.  Virtually ALL electrical power stations, both public and private, use timing signals generated by the Loran system for time-hack signals for power transmission and switching.  Why?  It's a more widely distributed, more reliably received, time signal than even the atomic clock at Ft. Collins, Colorado.
  The North American system of Loran transmitters consist of only slightly more than two dozen transmitters.  This provided Loran service throughout the U.S., most of Canada, Alaska, and portions of the Carribean.  It is maintained by the U.S. Coast Guard at far less expense and man-power than a similar number of VOR stations, yet the VOR system, in order to provide similar coverage JUST for navigational use (not including the other uses for which Loran is provided) requires over 600 individual transmitters.  In fact, those 600 transmitters do not provide coverage over the same amount of area, and the coverage that is provided is less accurate as already described.  (This need for locally placed VOR transmitters has an entirely different problem-set than first imagined, as they also require an equal number of monitors, power supplies (either locally obtained or long-distance transmission lines, and including emergency power generators).  It does not address the needs of technicians to maintain the sites, the needs of their families for access to schools, shopping, and hospitals for those sites in remote locations, etc. etc..  None of those requirements are necessary for Loran transmitter sites which are fewer in number and capable of being more conveniently placed.)
  So,...go ahead and enjoy your Loran.   Some older units are archaic and have cryptic operations and some of them are incapable of utilizing all the Loran transmission chains.  But, they are easily, and inexpensively replaced by updated units, many of which are IFR capable and certified.  In some cases, later models may be simple "slide-in" replacements for the obsolete models, for less than $200! !   These units usually have most, if not all, the convenient features of GPS units that cost thou$and$ of dollar$ more!  Moving maps and navigational databases, time/distance/fuel/flight computers, and more are all available on simple, cheap, Loran.  Long live Loran!</HTML>

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Re: Apollo II Loran C Manual

<HTML>You might try the website www.upsat.com under the heading of product support, literature, and 6xx units.  I found my 602 listed there and was able to download all the manuals in pdf format for which you can get a reader downloaded at the same time. Hope this is some help.
Fly Safe  Dave F</HTML>

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Re: Apollo II Loran C Manual

<HTML>I stand corrected.  After looking up my list of North American VORs I found that there are over 1140 VOR transmitters in North America, and they do not provide as much coverage as the few dozen Loran transmitters in present existence.  On top of all that, there are also Loran services provided in portions of Europe, Scandinavia, the Mediteranean,, Pacific Rim, and Russia!  Again, let's all get busy and encourage the greater use and expansion of this wonderful system of Loran navigation.  Lot's cheaper than GPS and lots easier to maintain than launching satellites.  (I'm not advocating reductions of GPS, I'm only advocating contiunance and expansion of Loran as a viable second system.)</HTML>

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Re: Apollo II Loran C Manual

<HTML>Thanks for the help and comments on my search for the Loran manual. I found a site on the web.
I only identified it as an Apollo II Loran C because that's how the seller identified it. When I discovered I had no manual, I saw in the logs that a Loran 20 was installed in 1985. Later after I sent this message I saw it had been replaced with an ARNAV R50 Loran. So, I didn't even know what I was looking for.
There is a web site www.arnav.com/manuals/htm which has this manual as well as other manuals both for installation and operators - just in case others are also looking.

Again, thanks for the help and all the information that was provided. It was very interesting!</HTML>

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