Hi ruud,
You are spot on, with your comments above,

I should have said, that the horizontal top section, Electrically extends the vertical part
by using the Whole Horizontal section, Not just Half of it, as in a true Marconi "T"
where the capacity hat is considered non radiating

Yes "Jim" I suppose to be accurate, it is an inverted L, but all antennas are variations on a theme
who said "The more it changes, the more its the same thing" ?

I Found a Brilliant site with Huge number of Offshore pictures, just keep clicking the right > and zooming in twice
https://www.flickr.com/photos/offshoreradio/53289302646/in/photostream/

Including Communicator photos like these... https://www.flickr.com/photos/offshoreradio/53243233428/in/photostream/
https://www.flickr.com/photos/offshoreradio/53242063007/in/photostream/
https://www.flickr.com/photos/offshoreradio/53242064482/in/photostream/

Question on this Laser photo below, what are the Gas cylinders for? just for welding? or for filling the balloons ?
especially the White ones in the frame above, with LINDE on them... Compressed air?
https://www.flickr.com/photos/offshoreradio/52827417640/in/photostream/

There are more questions than answers (Johnny Nash)

Rod Watts