“…However, the basic analytical ideas developed below can be applied to utilize other transmitters in the VLF band, DECCA, or LORAN-C near 100 kHz. Beukers (1973a) established the VLF signal strength environment in Dakar. Of particular interest for windfinding during GATE, there are the Omega transmitters between 10.2 and 13.6 kHz, a USSR transmitter in Krasnodar at 11.905,12.649,and 14.881 kHz, and the very powerful transmitters in Rugby, England (16 kHz), Cutler, Maine (17.8 kHz), Jim Creek, Wash. (18.6 kHz), and Balboa, C.Z.…”