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From: "Laurence KL1X" <hellozerohellozero@hotmail.com>
To: rsgb_lf_group@blacksheep.org
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Date: Sun, 10 Jun 2007 17:15:42 -0800
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Subject: RE: LF: MF Still on shifp?
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Status: O

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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