- Study guides, Class notes & Summaries

1-1A1 What is a requirement of all marine transmitting apparatus used aboard United States vessels? - Only equipment that has been certified by the FCC for Part 80 operations is authorized. 1-1A2 What transmitting equipment is authorized for use by a station in the maritime services? - Unless specifically excepted, only transmitters certified by the Federal Communications Commission for Part 80 operations. 1-1A3 Small passenger vessels that sail 20 to 100 nautical miles from the nearest l...

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13 pages

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Four factors that determine amount of ionization - Diurnal cycle 11 year sunspot cycle Seasonal cycle 27 day sun rotation D layer - Reflects freq lower then mf. Absorbs mf. Exists only during the day. E layer - Reflects mf at night to 100 mi. Daytime hf propagation to 1000 mi. Greatly weakened at night F1 layer - Absorbs hf. Exists only during the day F2 layer - Primary reflective region for hf. Combines with f1 at night Hf ground wave coverage as frequency increases - Decreases

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5 pages

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