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20
5 CHIAMATE SELETTIVE DIGITALI (DSC)
5.1 GeneralitΓ 
ξ˜―ξ™„ξ˜ƒξ™†ξ™‹ξ™Œξ™„ξ™ξ™„ξ™—ξ™„ξ˜ƒξ™–ξ™ˆξ™ξ™ˆξ™—ξ™—ξ™Œξ™™ξ™„ξ˜ƒξ™‡ξ™Œξ™Šξ™Œξ™—ξ™„ξ™ξ™ˆξ˜ƒξ˜‹ξ˜§ξ˜Άξ˜¦ξ˜Œξ˜ƒξ™±ξ˜ƒξ™˜ξ™‘ξ˜ƒξ™ξ™ˆξ™—ξ™’ξ™‡ξ™’ξ˜ƒξ™–ξ™ˆξ™ξ™Œξ˜ƒξ™„ξ™˜ξ™—ξ™’ξ™ξ™„ξ™—ξ™Œξ™†ξ™’ξ˜ƒξ™“ξ™ˆξ™•ξ˜ƒξ™–ξ™—ξ™„ξ™…ξ™Œ-
ξ™ξ™Œξ™•ξ™ˆξ˜ƒξ™˜ξ™‘ξ˜ƒξ™†ξ™’ξ™ξ™ξ™ˆξ™Šξ™„ξ™ξ™ˆξ™‘ξ™—ξ™’ξ˜ƒξ™•ξ™„ξ™‡ξ™Œξ™’ξ˜ƒξ™ˆξ™‡ξ˜ƒξ™±ξ˜ƒξ™–ξ™—ξ™„ξ™—ξ™’ξ˜ƒξ™†ξ™’ξ™‘ξ™†ξ™ˆξ™“ξ™Œξ™—ξ™’ξ˜ƒξ™‡ξ™„ξ™ξ™ξšΆξ˜²ξ™•ξ™Šξ™„ξ™‘ξ™Œξ™ξ™ξ™„ξ™ξ™Œξ™’ξ™‘ξ™ˆξ˜ƒξ˜°ξ™„ξ™•ξ™Œξ™—ξ™—ξ™Œξ™ξ™„ξ˜ƒ
ξ˜¬ξ™‘ξ™—ξ™ˆξ™•ξ™‘ξ™„ξ™ξ™Œξ™’ξ™‘ξ™„ξ™ξ™ˆξ˜ƒξ˜‹ξ˜¬ξ˜°ξ˜²ξ˜Œξ˜ƒξ™†ξ™’ξ™ξ™ˆξ˜ƒξ™–ξ™—ξ™„ξ™‘ξ™‡ξ™„ξ™•ξ™‡ξ˜ƒξ™Œξ™‘ξ™—ξ™ˆξ™•ξ™‘ξ™„ξ™ξ™Œξ™’ξ™‘ξ™„ξ™ξ™ˆξ˜ƒξ™“ξ™ˆξ™•ξ˜ƒξ™†ξ™’ξ™ξ™˜ξ™‘ξ™Œξ™†ξ™„ξ™ξ™Œξ™’ξ™‘ξ™Œξ˜ƒξ™•ξ™„ξ™‡ξ™Œξ™’ξ˜ƒ
ξ™Œξ™‘ξ˜ƒξ™ξ™’ξ™‡ξ™„ξ™ξ™Œξ™—ξ™ͺξ˜ƒξ˜Ήξ˜«ξ˜©ξ˜ξ˜ƒξ˜°ξ˜©ξ˜ƒξ™ˆξ˜ƒξ˜«ξ˜©ξ˜‘ξ˜ƒξ›Šξ˜ƒξ™–ξ™—ξ™„ξ™—ξ™„ξ˜ƒξ™†ξ™’ξ™‘ξ™†ξ™ˆξ™“ξ™Œξ™—ξ™„ξ˜ξ˜ƒξ™Œξ™‘ξ™’ξ™ξ™—ξ™•ξ™ˆξ˜ξ˜ƒξ™Œξ™‘ξ˜ƒξ™“ξ™„ξ™•ξ™—ξ™ˆξ˜ƒξ™‡ξ™„ξ™ξ˜ƒξ˜Άξ™Œξ™–ξ™—ξ™ˆξ™ξ™„ξ˜ƒξ™‡ξ™Œξ˜ƒ
ξ˜Άξ™’ξ™†ξ™†ξ™’ξ™•ξ™–ξ™’ξ˜ƒξ™ˆξ˜ƒξ˜Άξ™Œξ™†ξ™˜ξ™•ξ™ˆξ™ξ™ξ™„ξ˜ƒξ˜°ξ™„ξ™•ξ™Œξ™—ξ™—ξ™Œξ™ξ™’ξ˜ƒξ˜ͺξ™ξ™’ξ™…ξ™„ξ™ξ™ˆξ˜ƒξ˜‹ξ˜ͺξ˜°ξ˜§ξ˜Άξ˜Άξ˜Œξ˜‘ξ˜ƒξ›Šξ˜ƒξ™–ξ™—ξ™„ξ™—ξ™’ξ˜ƒξ™–ξ™—ξ™„ξ™…ξ™Œξ™ξ™Œξ™—ξ™’ξ˜ƒξ™†ξ™‹ξ™ˆξ˜ƒξ™ξ™„ξ˜ƒξ™ξ™’-
ξ™‡ξ™„ξ™ξ™Œξ™—ξ™ͺξ˜ƒξ˜§ξ˜Άξ˜¦ξ˜ƒξ™“ξ™’ξ™—ξ™•ξ™ͺξ˜ƒξ™ˆξ™™ξ™ˆξ™‘ξ™—ξ™˜ξ™„ξ™ξ™ξ™ˆξ™‘ξ™—ξ™ˆξ˜ƒξ™–ξ™’ξ™–ξ™—ξ™Œξ™—ξ™˜ξ™Œξ™•ξ™ˆξ˜ƒξ™ξ™ˆξ˜ƒξ™†ξ™‹ξ™Œξ™„ξ™ξ™„ξ™—ξ™ˆξ˜ƒξ™™ξ™’ξ™†ξ™„ξ™ξ™Œξ˜ƒξ™–ξ™˜ξ™ξ™ξ™ˆξ˜ƒξ™‰ξ™•ξ™ˆξ™”ξ™˜ξ™ˆξ™‘ξ™ξ™ˆξ˜ƒ
ξ™‡ξ™Œξ˜ƒξ™–ξ™’ξ™†ξ™†ξ™’ξ™•ξ™–ξ™’ξ˜ƒξ™ˆξ™‡ξ˜ƒξ™ˆξ™–ξ™–ξ™ˆξ™•ξ™ˆξ˜ƒξ™˜ξ™—ξ™Œξ™ξ™Œξ™ξ™ξ™„ξ™—ξ™„ξ˜ƒξ™“ξ™ˆξ™•ξ˜ƒξ™ξ™ˆξ˜ƒξ™—ξ™•ξ™„ξ™–ξ™ξ™Œξ™–ξ™–ξ™Œξ™’ξ™‘ξ™Œξ˜ƒξ™‡ξ™Œξ˜ƒξ™Œξ™‘ξ™‰ξ™’ξ™•ξ™ξ™„ξ™ξ™Œξ™’ξ™‘ξ™Œξ˜ƒξ™ξ™„ξ™•ξ™Œξ™—ξ™—ξ™Œξ™ξ™ˆξ˜ƒ
ξ™‡ξ™Œξ˜ƒξ™–ξ™’ξ™†ξ™†ξ™’ξ™•ξ™–ξ™’ξ˜ƒξ™ˆξ˜ƒξ™‡ξ™Œξ˜ƒξ™–ξ™Œξ™†ξ™˜ξ™•ξ™ˆξ™ξ™ξ™„ξ˜‘ξ˜ƒξ˜΄ξ™˜ξ™ˆξ™–ξ™—ξ™’ξ˜ƒξ™‘ξ™˜ξ™’ξ™™ξ™’ξ˜ƒξ™–ξ™ˆξ™•ξ™™ξ™Œξ™ξ™Œξ™’ξ˜ƒξ™†ξ™’ξ™‘ξ™–ξ™ˆξ™‘ξ™—ξ™Œξ™•ξ™ͺξ˜ƒξ™„ξ™Œξ˜ƒξ™ξ™„ξ™•ξ™Œξ™—ξ™—ξ™Œξ™ξ™Œξ˜ƒξ™‡ξ™Œξ˜ƒ
ξ™ˆξ™ξ™ˆξ™—ξ™—ξ™ˆξ™•ξ™ˆξ˜ƒξ™’ξ˜ƒξ™‡ξ™Œξ˜ƒξ™•ξ™Œξ™†ξ™ˆξ™™ξ™ˆξ™•ξ™ˆξ˜ƒξ™†ξ™‹ξ™Œξ™„ξ™ξ™„ξ™—ξ™ˆξ˜ƒξ™‡ξ™Œξ˜ƒξ™–ξ™’ξ™†ξ™†ξ™’ξ™•ξ™–ξ™’ξ˜ξ˜ƒξ™‡ξ™Œξ˜ƒξ™„ξ™Œξ™˜ξ™—ξ™’ξ˜ξ˜ƒξ™‡ξ™Œξ˜ƒξ™–ξ™Œξ™†ξ™˜ξ™•ξ™ˆξ™ξ™ξ™„ξ˜ξ˜ƒξ™˜ξ™•ξ™Šξ™ˆξ™‘ξ™—ξ™Œξ˜ƒξ™ˆξ˜ƒξ™‡ξ™Œξ˜ƒ
ξ™•ξ™’ξ™˜ξ™—ξ™Œξ™‘ξ™ˆξ˜ξ˜ƒξ™‡ξ™„ξ˜ƒξ™„ξ™ξ™—ξ™•ξ™ˆξ˜ƒξ™Œξ™ξ™…ξ™„ξ™•ξ™†ξ™„ξ™ξ™Œξ™’ξ™‘ξ™Œξ˜ƒξ™’ξ˜ƒξ™™ξ™ˆξ™•ξ™–ξ™’ξ˜ƒξ™”ξ™˜ξ™ˆξ™ξ™ξ™ˆξ˜ƒξ™‡ξ™’ξ™—ξ™„ξ™—ξ™ˆξ˜ƒξ™‡ξ™Œξ˜ƒξ™„ξ™“ξ™“ξ™„ξ™•ξ™ˆξ™†ξ™†ξ™‹ξ™Œξ™„ξ™—ξ™˜ξ™•ξ™ˆξ˜ƒξ˜§ξ˜Άξ˜¦ξ˜‘
5.1.1 Servizio di identicazione marittimo mobile (codice MMSI)
ξ˜―ξšΆξ˜°ξ˜°ξ˜Άξ˜¬ξ˜ƒξ™±ξ˜ƒξ™˜ξ™‘ξ˜ƒξ™†ξ™’ξ™‡ξ™Œξ™†ξ™ˆξ˜ƒξ™‡ξ™Œξ˜ƒξ™‘ξ™’ξ™™ξ™ˆξ˜ƒξ™†ξ™Œξ™‰ξ™•ξ™ˆξ˜ƒξ™˜ξ™–ξ™„ξ™—ξ™’ξ˜ƒξ™Œξ™‘ξ˜ƒξ™•ξ™„ξ™‡ξ™Œξ™’ξ™†ξ™’ξ™ξ™˜ξ™‘ξ™Œξ™†ξ™„ξ™ξ™Œξ™’ξ™‘ξ™ˆξ˜ƒξ™ξ™„ξ™•ξ™Œξ™‘ξ™„ξ˜ƒξ™“ξ™ˆξ™•ξ˜ƒξ™ξšΆξ™˜-
ξ™—ξ™Œξ™ξ™Œξ™ξ™ξ™’ξ˜ƒξ™‡ξ™ˆξ™ξ™ξ™„ξ˜ƒξ˜¦ξ™‹ξ™Œξ™„ξ™ξ™„ξ™—ξ™„ξ˜ƒξ˜Άξ™ˆξ™ξ™ˆξ™—ξ™—ξ™Œξ™™ξ™„ξ˜ƒξ˜§ξ™Œξ™Šξ™Œξ™—ξ™„ξ™ξ™ˆξ˜ƒξ˜‹ξ˜§ξ˜Άξ˜¦ξ˜Œξ˜‘ξ˜ƒξ˜΄ξ™˜ξ™ˆξ™–ξ™—ξ™’ξ˜ƒξ™†ξ™’ξ™‡ξ™Œξ™†ξ™ˆξ˜ƒξ™±ξ˜ƒξ™Œξ™ξ™“ξ™Œξ™ˆξ™Šξ™„ξ™—ξ™’ξ˜ƒξ™“ξ™ˆξ™•ξ˜ƒ
ξ™–ξ™ˆξ™ξ™ˆξ™ξ™Œξ™’ξ™‘ξ™„ξ™•ξ™ˆξ˜ƒξ™ξ™„ξ˜ƒξ™†ξ™‹ξ™Œξ™„ξ™ξ™„ξ™—ξ™„ξ˜ƒξ™™ξ™ˆξ™•ξ™–ξ™’ξ˜ƒξ™„ξ™ξ™—ξ™•ξ™ˆξ˜ƒξ™Œξ™ξ™…ξ™„ξ™•ξ™†ξ™„ξ™ξ™Œξ™’ξ™‘ξ™Œξ˜‘ξ˜ƒ
ξ˜©ξ™„ξ™•ξ™ˆξ˜ƒξ™•ξ™Œξ™‰ξ™ˆξ™•ξ™Œξ™ξ™ˆξ™‘ξ™—ξ™’ξ˜ƒξ™„ξ™ξ™ξ™„ξ˜ƒξ™–ξ™ˆξ™ξ™Œξ™’ξ™‘ξ™ˆξ˜ƒξ˜™ξ˜‘ξ˜œξ˜‘ξ˜”ξ˜‘ξ˜ƒ
ATTENZIONE
ξ˜΄ξ™˜ξ™ˆξ™–ξ™—ξ™„ξ˜ƒξ™•ξ™„ξ™‡ξ™Œξ™’ξ˜ƒξ™±ξ˜ƒξ™†ξ™’ξ™‘ξ™†ξ™ˆξ™“ξ™Œξ™—ξ™„ξ˜ƒξ™“ξ™ˆξ™•ξ˜ƒξ™ˆξ™ξ™ˆξ™—ξ™—ξ™ˆξ™•ξ™ˆξ˜ƒξ™˜ξ™‘ξ™„ξ˜ƒξ™†ξ™‹ξ™Œξ™„ξ™ξ™„ξ™—ξ™„ξ˜ƒξ™‡ξ™Œξ™Šξ™Œξ™—ξ™„ξ™ξ™ˆξ˜ƒξ™‡ξ™Œξ˜ƒξ™“ξ™ˆξ™•ξ™Œξ™†ξ™’ξ™ξ™’ξ˜ƒξ™ˆξ˜ƒξ™‡ξ™Œξ˜ƒ
ξ™–ξ™Œξ™†ξ™˜ξ™•ξ™ˆξ™ξ™ξ™„ξ˜ƒξ™Œξ™‘ξ˜ƒξ™ξ™„ξ™•ξ™ˆξ˜ƒξ™“ξ™ˆξ™•ξ˜ƒξ™‰ξ™„ξ™†ξ™Œξ™ξ™Œξ™—ξ™„ξ™•ξ™‘ξ™ˆξ˜ƒξ™ξ™„ξ˜ƒξ™•ξ™Œξ™†ξ™ˆξ™•ξ™†ξ™„ξ˜ƒξ™ˆξ˜ƒξ™Œξ™ξ˜ƒξ™–ξ™’ξ™†ξ™†ξ™’ξ™•ξ™–ξ™’ξ˜‘ξ˜ƒξ˜³ξ™ˆξ™•ξ˜ƒξ™ˆξ™–ξ™–ξ™ˆξ™•ξ™ˆξ˜ƒξ™ˆξ™‰ξšΏξ™†ξ™„ξ™†ξ™ˆξ˜ƒ
ξ™†ξ™’ξ™ξ™ˆξ˜ƒξ™–ξ™—ξ™•ξ™˜ξ™ξ™ˆξ™‘ξ™—ξ™’ξ˜ƒξ™‡ξ™Œξ˜ƒξ™–ξ™Œξ™†ξ™˜ξ™•ξ™ˆξ™ξ™ξ™„ξ˜ξ˜ƒξ™‡ξ™ˆξ™™ξ™ˆξ˜ƒξ™ˆξ™–ξ™–ξ™ˆξ™•ξ™ˆξ˜ƒξ™˜ξ™—ξ™Œξ™ξ™Œξ™ξ™ξ™„ξ™—ξ™’ξ˜ƒξ™–ξ™’ξ™ξ™’ξ˜ƒξ™„ξ™ξ™ξšΆξ™Œξ™‘ξ™—ξ™ˆξ™•ξ™‘ξ™’ξ˜ƒξ™‡ξ™ˆξ™ξ˜ƒξ™•ξ™„ξ™Šξ™Šξ™Œξ™’ξ˜ƒ
ξ™‡ξ™Œξ˜ƒξ™†ξ™’ξ™ξ™˜ξ™‘ξ™Œξ™†ξ™„ξ™ξ™Œξ™’ξ™‘ξ™ˆξ˜ƒξ™‡ξ™Œξ˜ƒξ™˜ξ™‘ξ˜ƒξ™–ξ™Œξ™–ξ™—ξ™ˆξ™ξ™„ξ˜ƒξ™‡ξ™Œξ˜ƒξ™™ξ™ˆξ™Šξ™ξ™Œξ™„ξ˜ƒξ™†ξ™’ξ™–ξ™—ξ™Œξ™ˆξ™•ξ™„ξ˜ƒξ™ξ™„ξ™•ξ™Œξ™‘ξ™„ξ˜ƒξ˜Ήξ˜«ξ˜©ξ˜‘ξ˜ƒξ˜¬ξ™ξ˜ƒ ξ™•ξ™„ξ™Šξ™Šξ™Œξ™’ξ˜ƒξ™‡ξ™ˆξ™ξ˜ƒ
ξ™–ξ™ˆξ™Šξ™‘ξ™„ξ™ξ™ˆξ˜ξ˜ƒξ™Œξ™‘ξ˜ƒξ™†ξ™’ξ™‘ξ™‡ξ™Œξ™ξ™Œξ™’ξ™‘ξ™Œξ˜ƒξ™‘ξ™’ξ™•ξ™ξ™„ξ™ξ™Œξ˜ξ˜ƒξ™‡ξ™’ξ™™ξ™•ξ™ͺξ˜ƒξ™ˆξ™–ξ™–ξ™ˆξ™•ξ™ˆξ˜ƒξ™„ξ™“ξ™“ξ™•ξ™’ξ™–ξ™–ξ™Œξ™ξ™„ξ™—ξ™Œξ™™ξ™„ξ™ξ™ˆξ™‘ξ™—ξ™ˆξ˜ƒξ™‡ξ™Œξ˜ƒξ˜•ξ˜“ξ˜ƒξ™ξ™Œξ™Šξ™ξ™Œξ™„ξ˜ƒ
ξ™‘ξ™„ξ™˜ξ™—ξ™Œξ™†ξ™‹ξ™ˆξ˜‘
5.2 Tipi di chiamate DSC
ξ˜³ξ™•ξ™ˆξ™ξ™ˆξ™•ξ™ˆξ˜ƒ ξ˜§ξ˜Άξ˜¦ξ˜’ξ˜°ξ˜¨ξ˜±ξ˜Έξ˜ƒξ™“ξ™ˆξ™•ξ˜ƒ ξ™„ξ™“ξ™•ξ™Œξ™•ξ™ˆξ˜ƒ ξ™Œξ™ξ˜ƒ ξ™ξ™ˆξ™‘ξ™˜ξ˜ƒξ™„ξ˜ƒ ξ™—ξ™ˆξ™‘ξ™‡ξ™Œξ™‘ξ™„ξ˜ƒ ξ™“ξ™ˆξ™•ξ˜ƒ ξ™–ξ™ˆξ™ξ™ˆξ™ξ™Œξ™’ξ™‘ξ™„ξ™•ξ™ˆξ˜ƒξ™Œξ™ξ˜ƒ ξ™—ξ™Œξ™“ξ™’ξ˜ƒ ξ™‡ξ™Œξ˜ƒ
ξ™†ξ™‹ξ™Œξ™„ξ™ξ™„ξ™—ξ™„ξ˜ƒξ˜§ξ˜Άξ˜¦ξ˜ƒξ™‡ξ™„ξ˜ƒξ™Œξ™‘ξ™™ξ™Œξ™„ξ™•ξ™ˆξ˜‘ξ˜ƒξ˜Άξ™’ξ™ξ™’ξ˜ƒξ™—ξ™•ξ™ˆξ˜ƒξ™†ξ™‹ξ™Œξ™„ξ™ξ™„ξ™—ξ™ˆξ˜ƒξ™“ξ™’ξ™–ξ™–ξ™’ξ™‘ξ™’ξ˜ƒξ™ˆξ™–ξ™–ξ™ˆξ™•ξ™ˆξ˜ƒξ™™ξ™Œξ™–ξ™˜ξ™„ξ™ξ™Œξ™ξ™ξ™„ξ™—ξ™ˆξ˜ƒξ™‘ξ™ˆξ™ξ™ξ™’ξ˜ƒ
ξ™–ξ™—ξ™ˆξ™–ξ™–ξ™’ξ˜ƒξ™ξ™’ξ™ξ™ˆξ™‘ξ™—ξ™’ξ˜ƒξ™–ξ™˜ξ™ξ™ξ™’ξ˜ƒξ™–ξ™†ξ™‹ξ™ˆξ™•ξ™ξ™’ξ˜‘
ξ˜³ξ™•ξ™ˆξ™ξ™ˆξ™•ξ™ˆξ˜ƒξ˜Έξ˜³ξ˜’ξ˜§ξ˜Ίξ˜ƒξ™’ξ˜ƒξ™•ξ™˜ξ™’ξ™—ξ™„ξ™•ξ™ˆξ˜ƒξ™Œξ™ξ˜ƒξ™–ξ™ˆξ™ξ™ˆξ™—ξ™—ξ™’ξ™•ξ™ˆξ˜ƒCHξ˜ƒξ™“ξ™ˆξ™•ξ˜ƒξ™–ξ™†ξ™’ξ™•ξ™•ξ™ˆξ™•ξ™ˆξ˜ƒξ™‰ξ™•ξ™„ξ˜ƒξ™ξ™ˆξ˜ƒξ™†ξ™‹ξ™Œξ™„ξ™ξ™„ξ™—ξ™ˆξ˜ƒξšΏξ™‘ξ™†ξ™‹ξ™°ξ˜ƒ
ξ™Œξ™ξ˜ƒξ™†ξ™˜ξ™•ξ™–ξ™’ξ™•ξ™ˆξ˜ƒξ™–ξ™Œξ˜ƒξ™—ξ™•ξ™’ξ™™ξ™„ξ˜ƒξ™–ξ™˜ξ™ξ™ξšΆξ™’ξ™“ξ™ξ™Œξ™’ξ™‘ξ™ˆξ˜ƒξ™‡ξ™ˆξ™–ξ™Œξ™‡ξ™ˆξ™•ξ™„ξ™—ξ™„ξ˜‘ξ˜ƒξ˜³ξ™•ξ™ˆξ™ξ™ˆξ™•ξ™ˆξ˜ƒξ™Œξ™ξ˜ƒξ™—ξ™„ξ™–ξ™—ξ™’ξ˜ƒCHξ˜‘ξ˜ƒξ˜¦ξ™Œξ˜ƒξ™–ξ™’ξ™‘ξ™’ξ˜ƒξ™Œξ˜ƒξ™–ξ™ˆ-
ξ™Šξ™˜ξ™ˆξ™‘ξ™—ξ™Œξ˜ƒξ™—ξ™Œξ™“ξ™Œξ˜ƒξ™‡ξ™Œξ˜ƒξ™†ξ™‹ξ™Œξ™„ξ™ξ™„ξ™—ξ™ˆξ˜

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