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Date: Thu, 18 Jun 2015 15:54:37 +0200
From: DK7FC <selberdenken@posteo.de>
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Subject: Re: LF: MF propagation over sea water
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Hello Roelof an Dimitris,

Interesting. Thanks for the link to the ITU document.
73, Stefan


Am 18.06.2015 11:54, schrieb roelof@ndb.demon.nl:
> Hello Stefan,
>
> About 10 years ago a couple of NDB chasers have been investigating
> this issue by comparing reception of NDB's over a sea path and a
> land path. To exclude sky wave propagation as good as possible, the
> tests were done in summer at the time of the sun's solstice.
>
> Though by no means a scientific research, it was found
> that the length of a sea path was up to four times the length of a
> land path!
>
> I live about 8 km from the sea wall here and my furthest daytime
> signal has been the now decommissioned NDB AB, Akraberg, Faroer,
> 1268 km away. There is another one on the Faroer, MY, Myggenaes, on
> 337 kHz, 1360 km away, which is still active. I could hear it at
> daytime by ear in the past. Unfortunately power seem to have been
> reduced as the carrier on 336.970 kHz is about 4 dB above my noise
> floor at the moment.
>
> 73,
> Roelof Bakker, pa0rdt
>
>