RE: LF: MF Still on shifp?

["Laurence KL1X" <hellozerohellozero@hotmail.com>]

Well as far as the Chinese and Korean ship builders they (as far as Ive seen 
over the past couple of years ) are not putting in any MF (500KHz)  
equipment - GMDSS area dependant whether VHF or HF is installed but nothing 
on 500Khz et al. What we put in ships/tankers/platforms has been or more 
than a passing interest.
Bcasts on 500Khz area continue in china from xsg on 522.5KHz..

Changing back to LF - Ill be in San Antonio Texas for the next 2 days and 
may have the Singapore (sic) grabber running. Any USA or Eu signals 
welcomed.
Laurence
KL1X/5 Marriot NW 10th Floor
San Antonio




> From: "Andy Talbot" <andy.g4jnt@googlemail.com>
> Reply-To: rsgb_lf_group@blacksheep.org
> To: rsgb_lf_group@blacksheep.org
> CC: "Linda Holtby" <linda.holtby@googlemail.com>
> Subject: LF: MF Still on shifp?
> Date: Sat, 9 Jun 2007 18:32:41 +0100
>
> Yesterday I was watching two large cruise ships sail down Southampton water
> (P&O ships,  'Artemis' and 'Aurora').   Both had a large wire antennas
> strung between the masts, and in the case of  Artemis this extended down at
> each end close to bow and stern; and there may even have been two wire
> side-by-side on this ship.  A really long antenna.   I'm not sure of the
> length of these ships, but they could  be 200 metres (ish), so even at the
> bottom end of HF these are electrically long-wires.
> Of course, the pair on Artemis, if I saw them correctly, could even be
> phased for really high gain at HF - a Rhombic perhaps?
>
> Does anyone know if large modern ships still have MF, or a serious HF
> presence?  Or are the wire antenna(s ?) just there to hang flags from?  Or
> are they not even antennas, but just used for supporting decorations.
>
> Artemis also had a mass of big whips on the bow, which I assume were base
> tuned HF - the normal VHF whips were practically invisible beside them.
> Aurora presumably had something similar, but they weren't obvious.
>
> Needless to say, each ship had two large VSAT radomes, and three or four
> smaller Inmarsat (and other satcom?) antennas.
>
> Andy  G4JNT
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