In a perfect situation you'd not notice any issues, a properly sealed
and shielded cable won't mind whether it's awash or not.

That said, if you are having problems, I've no doubt it could be the
cable. A cable in the elements can degrade much more quickly then one
would assume, especially in the presence of sea water. Is it possible to
carefully inspect this cable over the whole run? Pay particular
attention to corners and where the cable mounts hold it. It's entirely
likely that a small crack or hole has formed letting water in.

Also have a good look at the ends, look for signs of corrosion. I've had
many cases where a properly weather sealed end looked perfectly fine on
the outside, but after years of exposure started to let water in. The
freeze/thaw cycle can breach even the highest quality connectors.

TTYL

On Mon, 2013-02-04 at 14:21 +0000, Joe McCauley wrote:
> This may not be the most appropriate forum for this, but there are a lot =
of knowledgeable people here....
>=20
> Does anyone have any thoughts on what the effect on transmission efficien=
cy would be of the antenna feed cable for a marine VHF  radio being partly =
submerged in seawater. (f~160MHz)
>=20
> The cable on my scuba club's boat runs along the deck which is always par=
tially awash. This is the way it was built. Apart from that reason, I don't=
 think that the cable being immersed should cause significant issues.  We a=
re having radio transmission issues. The antenna is mounted ~1.5 meters abo=
ve the deck.
>=20
> I've not had the opportunity to look at it yet & expect to find connectio=
n issues when I do, but it has been suggested that the immersion of the cab=
le could be causing our problem. As I said, I don't believe that, but......=
..
>=20
> Thanks for any info,
>=20
> Joe
>=20


--=20
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