Quote:
Originally Posted by Lindley
All I could find:
BRASS RADIO ROOM DECK CLOCK FOR U.S. MARITIME COMMISSION,
WWII era, unmarked, of solid, polished red bronze; 12/24 hour spun brass 6" dial face with second bits at 12 o'clock, black enamel spade hands and numerals, fast-slow regulator, marked with red sectors which reflect periods of silence observed by radio operators to monitor airwaves for distress signals; 7" diameter across screw bezel and 7.25" across mounting flange. Dial engraved and painted in black letters U.S. Maritime Commission. |
Quote:
Originally Posted by Singed
I'd seen them before and at some point growing up around boats I'd heard there were radio silence periods, maybe in a marine antiques store or something. At least with a starting point, I knew where to look.
The two red bands are periods of radio silence during which only distress signals can be transmitted. The two black bands correspond with the green bands on some other clocks, and those two periods were also radio silence to listen for coastal distress signals.
http://www.chelseaclock.com/site_ass...pdf?1315842133
Go down and look at the radio room clock. |
thank you guys !
it is very interesting discovering things like that and i think i got an idea of what possibly these marked areas stood for.
Lindley's post also is giving a good point of their use ,saying ''...reflecting periods of silence observed by radio operators to monitor airwaves for distress signals''.
is this the same point that Signed's post says ?(my english are not helping me much here)
as i get it so far is that these marked areas where only for transimiting sos signal messages.but the question is : sos messages where on specific frequences on
radio,what does the clock has to do with this ?