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Huh? Diesel engines don't last 800 hours before major repairs??
Subject: Huh? Diesel engines don't last 800 hours before major repairs??
From: (JAXAshby) Date: 08/08/2004 13:56 Pacific Standard Time Message-id: shen, every last country signatory to the radio treaty of 1920 (1919?) required their radio stations to broadcast their call sign, frequency and city every ten minutes they were on the air. This was done specifically as an aid to navigation for ships at sea and aircraft in the air. recreational boats often did not have any such equipment until into the 1970's, 1980's and in some cases 1990's. Lots of recreational vessels were lost due to hitting rocks in reduced visability conditions until lorans and later gps's became common. Stories of vessels lost such were common in the boating magazines until the late 1980's. All well and good. However there were many areas of the world, where the coverage for RDF was poor and not all charts carried the exact locations of all transmitters. To all this, add the corrections needed for using stations, inland, with great distance, and, the skill of the operator and proper alignment of equipment and you'd find any number of limitations associated with it's use. I.e., it wasn't a cure-all, just another aid that had to be used with caution. By the 70's, a high percentage of recreational boaters in the US were beginning to use Loran, as it didn't generally require the skill that RDF did. Shen |
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