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From: ralph@arising.com.au
Date: 04 Apr 2002
Time: 22:10:41
Remote Name: 152.91.9.49
You could try putting the radials inside polyethelene pipe. Use something at the centre to make a junction box and fill this with silicon sealant. Of course you need to block the ends.
Ship board users have noticed a significant improvement in signals when they use radials as against just the "earth plate".
You could also experiment with the depth of the radials. Don't forget that water has a dielectric constant of 80 so the radials may need to be sqrt(80) = 8.9 times shorter than in free space.
I would initially experiement with bare radials to see if there is any benefit and at which depths before outlaying money for materials - just in case it is a waste of time.
Let me know how you go.