tag:blogger.com,1999:blog-5480750694693825336.post4357046797115859612..comments2024-03-21T00:59:58.137-07:00Comments on G0KYA's Amateur Radio Blog: History of ships' radio room clocksSteve Nicholshttp://www.blogger.com/profile/03564402221894277279noreply@blogger.comBlogger23125tag:blogger.com,1999:blog-5480750694693825336.post-32861552769664745502022-10-05T10:24:51.401-07:002022-10-05T10:24:51.401-07:00I don't think ships even have a radio room now...I don't think ships even have a radio room nowadays, so no, no clocks!Steve Nicholshttps://www.blogger.com/profile/03564402221894277279noreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-10989821171661005702022-10-05T09:43:33.103-07:002022-10-05T09:43:33.103-07:00Just curious. Are merchant ships today still requi...Just curious. Are merchant ships today still required to have a RADIO ROOM CLOCK? I cannot find any regulation for this particular issue.Manjit Handanoreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-1928579749372694432022-08-31T09:11:50.706-07:002022-08-31T09:11:50.706-07:00Most of the decent size ships today still have tho...Most of the decent size ships today still have those clock faces on bridge clocks...at least in the finnish cargo ships they do. I knew what the red areas were (seen old movies) but the green ones were a mystery. But literally no officer I have ever asked has known the pourpose of them.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-85963044789303361662021-05-15T07:55:30.481-07:002021-05-15T07:55:30.481-07:00I qualified as a Marine Radio Officer in 1968 and ...I qualified as a Marine Radio Officer in 1968 and sailed as an RO for BP tankers until the early 70s. I can assure you that 500 kHz was the international distress frequency then and until around the 90s. Silence periods were scrupulously observed because, especially in northern Europe waters, 500 kHz was very heavily trafficked because it was also the frequency used to call up coast stations and other vessels. The general noise of the traffic would drown any weak distress signals, which could also potentially have come from the hand-cranked emergency transmitter carried in a lifeboat. The silence periods were also useful to make the autoalarm signals more audible. As you probably know, all vessels were obliged to maintain a 24 hour watch on 500 kHz so that on a vessel only carrying a single radio officer, known as an H8 vessel, the autoalarm was set for use when the sparky was off watch. Anonymoushttps://www.blogger.com/profile/09387054104546417674noreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-72284394306167103812021-02-22T22:44:06.239-08:002021-02-22T22:44:06.239-08:00The red marks around the outside were for the 12 f...The red marks around the outside were for the 12 four second ‘dahs’ designed to trigger other ships automatic alarm system. These were sent before an SOS. <br /><br />Have a listen to episode 27 & 28 of the ‘Dit Dit Dot’ podcast JackHenryhttps://www.blogger.com/profile/12450978144863760911noreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-8038224867215626962021-02-22T22:44:00.979-08:002021-02-22T22:44:00.979-08:00The red marks around the outside were for the 12 f...The red marks around the outside were for the 12 four second ‘dahs’ designed to trigger other ships automatic alarm system. These were sent before an SOS. <br /><br />Have a listen to episode 27 & 28 of the ‘Dit Dit Dot’ podcast JackHenryhttps://www.blogger.com/profile/12450978144863760911noreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-75942159163040552242021-02-22T22:43:03.700-08:002021-02-22T22:43:03.700-08:00The red marks around the outside were for the 12 f...The red marks around the outside were for the 12 four second ‘dahs’ designed to trigger other ships automatic alarm system. These were sent before an SOS. <br /><br />Have a listen to episode 27 & 28 of the ‘Dit Dit Dot’ podcast JackHenryhttps://www.blogger.com/profile/12450978144863760911noreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-25478079278630752992019-07-02T23:54:00.188-07:002019-07-02T23:54:00.188-07:00Yes. The additional hour hand was set to GMT (the ...Yes. The additional hour hand was set to GMT (the time at the Prime Meridian which passes through Greenwich, England --hence, "Greenwich Mean Time" or "GMT"), now known as UTC ("Coordinated Universal Time") which is synchronized via atomic cesium clocks at the U.S. Naval Observatory and the time signals thereof transmitted by various radio stations of the National Institute of Standards and Technology on 2.5, 5. 10 and 15 MHz. Other nations likewise have official radio frequencies dedicated 24/7 to time signals. Aviators, mariners and radio operators keep time according to GMT/UTC so that all are "on the same time." Every so often, the cesium atomic clocks get ahead of the universe's time so a "leap second" -- literally a 61st second -- is inserted into the 59th minute of the 23rd hour UTC in order to synchronize clock time with universal time.<br />Anonymoushttps://www.blogger.com/profile/13183511772591989769noreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-27941008759272027562018-04-26T10:34:03.547-07:002018-04-26T10:34:03.547-07:00This brings back a few memories. I was a USCG Radi...This brings back a few memories. I was a USCG Radioman at NMO (Honolulu). Work seven SOS or XXX cases from 1977-83 and while on USCGC Munro (NGDF) one XXX that ended up being a three day rescue. I think the most significant was the MS Princendam (PJTA) SOS which happened in Oct 1980. They still do a survivor's reunion every Oct. S A Walkerhttp://www.aps.comnoreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-44226742299653323242018-04-24T03:28:45.645-07:002018-04-24T03:28:45.645-07:00Reading around on this fascinating subject, it see...Reading around on this fascinating subject, it seems practical use of the the 500KHz band starts after 1908 and was over before the 1950s (though its final abandonment only came in 1999 when coastguard monitoring ceased).<br />From 1932, 1650 kHz began to be used as the main international distress frequency, and though not documented, it would have been odd to introduce this and not have a silent monitoring period for it.<br />2182KHz started to be used in the 1950s, ending in 2013 when the US Coast Guard stopped monotoring it, as GMDSS has supplanted it.<br />These dates suggest the red-sector only clock is likely to be early - after 1908 (prob >1912) and likely before 1932 when 1650 kHz began to be used, and certainly before ~1950.<br />HTHs!<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-26055005973859705092018-02-24T11:50:56.291-08:002018-02-24T11:50:56.291-08:00I repair clocks and have in a Chelsea clock with o...I repair clocks and have in a Chelsea clock with only the red markings. It is labeled US Maritime Commission. The clock has two hour hands that can be set for two time zones. Radio clock?Mikehttp://www.wiseowlclockrepair.comnoreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-11181805635198367362017-03-02T10:51:24.202-08:002017-03-02T10:51:24.202-08:00wow 2 days !! , i will cast about for a friend wi...wow 2 days !! , i will cast about for a friend with ps experience , hopefully mine will be a bit simpler with just a white background and black numbers . Thank you for the pointers .:)<br />regards<br />robert.roberthttps://www.blogger.com/profile/10128615577477510975noreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-34427682807755839252017-03-02T09:15:48.216-08:002017-03-02T09:15:48.216-08:00Hi Robert,
Just did a double take there - I thoug...Hi Robert,<br /><br />Just did a double take there - I thought I had seen TWO Jaguar straight six engines, then I realised I had! I started by scanning a clock face and then went to work with Photoshop. It took me two days, but I got the result I wanted. The Photoshop file had nearly 40 layers with everything separate so that everything was independent. Best bet is to find a tame graphic designer unless you are familiar with Photoshop.Steve Nicholshttps://www.blogger.com/profile/03564402221894277279noreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-48205795022880005262017-03-02T06:58:03.728-08:002017-03-02T06:58:03.728-08:00Hi Steve , fascinating blog , I am in a similar p...Hi Steve , fascinating blog , I am in a similar position regarding clock face design , but with a bit of a twist .. i am constructing this car ,<br /><br />http://www.rodsnsods.co.uk/forum/garage/medusa-206057<br /><br /><br />and for the dash vintage rev counter i am using this old radio room clock ...<br /><br />http://i32.photobucket.com/albums/d44/ivanhoew/medusa/IMG_3165_zpsmklngfwj.jpg<br /><br />http://i32.photobucket.com/albums/d44/ivanhoew/medusa/IMG_3164_zpsyh1id3nn.jpg<br /><br /><br /> I want to make get a dial printed with rpm on it , basically 0to 6k going from 8pm to 4 pm. can you point me in the right direction as to how you did yours ?<br /><br /><br />regards<br />robert.roberthttps://www.blogger.com/profile/10128615577477510975noreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-6224763259537598582014-05-08T06:55:19.556-07:002014-05-08T06:55:19.556-07:00Best I can suggest is you pinch one off the 'n...Best I can suggest is you pinch one off the 'net :-)<br /><br />http://www.sellingantiques.co.uk/261219/smiths-red-green-segment-radio-room-clock/Richardhttp://nanoreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-89325243622035447502014-05-07T11:16:31.106-07:002014-05-07T11:16:31.106-07:00If you can get me the face off one I'll do it!...If you can get me the face off one I'll do it! Or at least a good scan of one.Steve Nicholshttps://www.blogger.com/profile/03564402221894277279noreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-51237927077427669792014-05-07T11:13:45.685-07:002014-05-07T11:13:45.685-07:00Bit disappointing that it wasn't modeled after...Bit disappointing that it wasn't modeled after a good old British Smiths Astral radio room clock! :-)Richardhttp://nanoreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-25435032388758206002013-05-28T04:48:50.937-07:002013-05-28T04:48:50.937-07:00I hope you take part in the annual MRD events :-)
...I hope you take part in the annual MRD events :-)<br /><br />73 de OH8XAT (ex DRKF)<br /><br />and remember! QRX3 SP AS<br /><br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-84228289584876550422010-11-10T13:53:23.316-08:002010-11-10T13:53:23.316-08:00Aha one of my favourite books of the last 10 years...Aha one of my favourite books of the last 10 years - "Longitude". In Oz I was a CB guy on SSB for 3 glorious years and an SWL for the same time 1997 to 2000. It was a sad day when my 5/8 vertical was taken down and the wire rolled up, the radios put "in storage" with a friend (I expect to never see them again BTW). But how your story got to me, was it reminded me how habitually in the Central West of NSW I used to tune my FRG7700 to 2.182 USB whnever I was reading a book or not particularly searching for anying, just in case I heard something that was important and maybe even I could use the phone to alert the right people. In those three years I can remember earing a thing, but it didn't stop me listening! all the best, ScottyScott Carpenternoreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-8124503327987997702010-09-18T05:05:25.857-07:002010-09-18T05:05:25.857-07:00Yes, the great John Harrison - there was a brillia...Yes, the great John Harrison - there was a brilliant TV adaptation on the BBC some time ago called "Longitude".<br /><br />You can still get it on DVD - see: <br />http://www.amazon.co.uk/gp/product/B000L42N96?ie=UTF8&tag=cringlefordsc-21&linkCode=as2&camp=1634&creative=6738&creativeASIN=B000L42N96Steve Nicholshttps://www.blogger.com/profile/03564402221894277279noreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-80407193852210746412010-09-17T17:42:54.528-07:002010-09-17T17:42:54.528-07:00On a related topic you should take a look at a boo...On a related topic you should take a look at a book describing the English government's search for a way to determine longitude at sea, which required a chronometer that would remain accurate under those conditions:<br />http://www.amazon.com/Longitude-Genius-Greatest-Scientific-Problem/dp/0140258795<br /><br />A fascinating read.John AE5Xhttp://www.ae5x.com/blognoreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-78817768805259050712010-09-17T10:41:11.183-07:002010-09-17T10:41:11.183-07:00Thanks Dick - probably keeps better time than the ...Thanks Dick - probably keeps better time than the old clockwork ones too! 73 Steve G0KYASteve Nicholshttps://www.blogger.com/profile/03564402221894277279noreply@blogger.comtag:blogger.com,1999:blog-5480750694693825336.post-80650196366442322812010-09-17T10:24:07.436-07:002010-09-17T10:24:07.436-07:00I have one of those clock reproductions. Works fin...I have one of those clock reproductions. Works fine. The real thing, now an antique, can go for $1000 and higher. 73 DickDickhttps://www.blogger.com/profile/10984094559146508871noreply@blogger.com