## Slovar

Slovar

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#### MSI

Maritime Safety Information - Navigational and meteorological warnings, meteorological forecasts, and other urgent safety-related information broadcast to ships.
 Keyword(s): MSI

#### MUF

Maximum Usable Frequency is the frequency at which radio communications just starts to fail. It is caculated by formula: MUF=f0/cos alpha where is
h= layer height
f0= layer density
alpha = arc tg ((d/2)/h)
 Keyword(s): Maximum usable frequencyMUF

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