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Marking Time Successful Navigating Requires Temporal Accuracy

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Marking Time Successful Navigating Requires Temporal Accuracy HIGH SEAS EMBARKING ON MARITIME LISTENING James Hay Marking Time Successful Navigating Requires Temporal Accuracy illust how do ships find their way Table 1 isalist across the ocean? Navigational TABLE 1: Active Time Signal Stations of some of the methods and aids have evolved stations which Call Lenora Location Mode dramatically since the days of the Ereq_kfz are active. Polynesian navigators and Christo- 50 OMA Prague CW Most ofthese pher Columbus, centuries later. It has RTZ Irkutsk CW time signal 60 MSF Rugby CW stations are not often been said that Columbus find- WWVB Fort Collins CW ing America was an amazing feat. 75 HBG Nyon CW on 24 hours Seamen of that time used a form of 77.5 DCF 77 Mainflingen CW per day, but 2500 BPM Xi'an CW celestial navigation and instruments HLA Taejon AM/SSB time signals which pale beside the modern chro- JJY Tokyo AM/SSB will usually be nometer and sextant. What was truly RCH Tashkent CW found on the hour, or at intervals of VHG Sydney SSB 4 6 Midnight, 0600, amazing about Columbus was not WWV Fort Collins AM/SSB usually or hours. only that he found America, but that WWVH Kihai AM/SSB noon and 1800 local or universal time he managed to find it the second time 3330 CHU Ottawa AM/SSB are common. Don't be deterred by the 3810 HD2 lOA Guayaquil AM/SSB and returned to Europe to tell of it. 4286 VWC Calcutta CW strong presence of W W VH and WWV One of the things which has been 4996 RWM Moscow CW on 2.5, 5, 10, and 15 MHz. I have important to since Co- 5000 ATA Delhi SSB logged WWVH and WWV simulta- navigation BPM Xi'an AM/SSB lumbus' days is time-accurate time. HD2 lOA Guayaquil AM/SSB neously from Montreal, but I have No matter how good HLA Taejon AM/SSB also heard BPM when neither Ameri- IAM Rome SSB can station was anywhere to be found Tokyo AM/SSB JJY noise. These are interesting LOL 1 Buenos Aires AM/SSB in the RCH Tashkent CW stations to chase, and they can pro- VHG Sydney SSB vide a clue to the current propagation WWV Fort Collins AM/SSB WWVH Kihai AM/SSB conditions. YVTO Caracas CW/SSB 6475.5 Norddeich CW DAM Enter Loran 7335 CHU Ottawa AM/SSB AM/SSB 7600 HD2 lOA Guayaquil navigation, the 8000 JJY Tokyo AM/SSB Celestial sailor's 8167.5 LOB 9 Buenos Aires CW mainstay, is now used as a backup 8473 4PB Colombo CW system. The Loran -C system (Long 8502 XSG Shanghai CW Range Aid to Navigation) was the you 8638.5 DAM Norddeich CW 9996 RWM Moscow CW next navigational system to come into are, you cannot suc- 10000 ATA Delhi SSB common use, operating on 100 kHz cessfully navigate by the stars using BPM Xi'an CW/SSB using a pulse modulated system to either an astrolabe or the modern JJY Tokyo AM/SSB LOL 2 Buenos Aires CW/SSB differentiate between stations. Again, sextant without an accurate time RCH Tashkent CW time is an important factor. In source. Fortunately, radio has made RTA Novosibirsk CW WWV Fort Collins AM/SSB fact, one of the the setting of ships clocks and chro- WWVH Kihai AM/SSB nometers easy, and the International 10004 RID Irkutsk CW Radio Regulations still require that 12984 VNG Sydney CW lde.2 14670 CHU Ottawa AM/SSB td< the clock in the radio room be checked 14996 RWM Moscow CW daily for its accuracy. 15000 ATA Delhi SSB Stations which broadcast time sig- BPM Xi'an CW/SSB BSF Tai-pei CW/SSB nals have a distinctive sound, and are JJY Tokyo AM/SSB usually easy to spot. The station may LOL 3 Buenos Aires CW/SSB identify itself in either voice or Morse RTA Novosibirsk CW WWV Fort Collins AM/SSB QSLs on code and its voice announcements WWVH Kihai AM/SSB this page include (at may be either in English or in the 15004 RID Irkutsk CW language of the country. Time signal 16000 VNG Sydney SSB left) LQB 9 in Buenos Aires, 20000 WWV Fort Collins AM/SSB stations make an interesting catch. WWVH Kihai AM/SSB (top) BPM in Xi'an, and (above) HD2 IOA in Guayaquil. 84 MONITORING TIMES September 1994 www.americanradiohistory.com.
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