功能描述:
　　1.供船舶安全管理相關(guān)人員呼叫、對講。
　　2.主機(jī)具有呼叫聲光指標(biāo)。
　　3.主機(jī)具有通播功能。
　　Functional Description
　　For marine security management person for shouting and talk-back.
　　The main unit has call acousto-optic indicating.
　　The main unit has broadcast function.