![](http://www.sowp.org/wp-content/uploads/2018/07/LR-0306261811-Abernathy-11-copy.jpg)
L to R: MG Abernathy, Bauman, Pratt, Rice, LaVelle, Williams
![](http://www.sowp.org/wp-content/uploads/2018/07/LR-0306261812-Abernathy-12-copy.jpg)
Yerba Buena Island in SF Bay “had light house to guide boats clear of SF fog”
![](http://www.sowp.org/wp-content/uploads/2018/07/LR-0306261813-Abernathy-13-copy.jpg)
Radio Station NPG, Yerba Buena Island, Telephoto Shot from Ferry Building
![](http://www.sowp.org/wp-content/uploads/2018/07/LR-0306261814-Abernathy-14-copy.jpg)
NPG, View from East End of Island. “Training station abandoned 23 June 1923…”
![](http://www.sowp.org/wp-content/uploads/2018/07/LR-0306261815-Abernathy-15-copy.jpg)
“Area lower L is now E mouth of Bay Bridge Tunnel”
![](http://www.sowp.org/wp-content/uploads/2018/07/LR-0306261816-Abernathy-16-copy.jpg)
“Barracks, mess hall L… at R penthouse shields Kolster RDF antenna mechanism…”
![](http://www.sowp.org/wp-content/uploads/2018/07/LR-0306261817-Abernathy-17-copy.jpg)
Central Mast from W End of Island
![](http://www.sowp.org/wp-content/uploads/2018/07/LR-0306261818-Abernathy-18-copy.jpg)
Typical Antenna Support
![](http://www.sowp.org/wp-content/uploads/2018/07/LR-0306271801-Abernathy-20-copy.jpg)
Central Mast and Antenna from E
![](http://www.sowp.org/wp-content/uploads/2018/07/LR-0306271802-Abernathy-21-copy.jpg)
“Barrage loop antenna, beamed on ‘Great Circle Route’ to NPM and NPO”
![](http://www.sowp.org/wp-content/uploads/2018/07/LR-0306271803-Abernathy-22-copy.jpg)
“Loop used for reception, Pearl Harbor, w. barrage circuit for telegraphone reception”
![](http://www.sowp.org/wp-content/uploads/2018/07/LR-0306271806-Abernathy-25-copy.jpg)
Telephone Transmitter Building and Antenna
![](http://www.sowp.org/wp-content/uploads/2018/07/LR-0306271807-Abernathy-26-copy.jpg)
Telephone Receiver, Shortwave Transmitter, and Radio Compass Buildings