| 1. | Her navigation equipment included wireless direction finding and an echo sounding device.
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| 2. | A vital aspect was the design of the seaborne direction finding antenna.
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| 3. | This revealed little, and the problem was traced to inadequate direction finding.
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| 4. | This includes HF contesting, Amateur Radio Direction Finding, and High Speed Telegraphy.
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| 5. | None of the ships carried HF / DF high-frequency direction finding sets.
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| 6. | After four hours of direction finding and flyovers, Lee figured it out.
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| 7. | By 1933 she carried wireless direction finding and echo sounding equipment.
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| 8. | Instead, D�nitz thought that Britain was using radar and direction finding.
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| 9. | A Navy Direction Finding Station was later erected on the site in 1942.
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| 10. | This allowed German direction finding teams time to triangulate their positions.
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