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Further call attempts should be delayed at least ____ if\r\nacknowledgement is still not received?","questionTimeSeconds":"0","questionTimeMinutes":"1","questionImagePath":null,"position":null,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":487851,"quiz_id":"24964","answer_id":null,"answerType_id":"0","created_at":"2018-06-12 01:07:37","updated_at":"2018-06-12 01:07:37","questionName":"A polarization of a radio wave is determined by a:","questionTimeSeconds":"0","questionTimeMinutes":"1","questionImagePath":null,"position":null,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":487845,"quiz_id":"24964","answer_id":null,"answerType_id":"0","created_at":"2018-06-12 01:00:42","updated_at":"2018-06-12 01:00:42","questionName":"Which of the following satellite systems is of particular importance to search and rescue missions under\r\nGMDSS?","questionTimeSeconds":"0","questionTimeMinutes":"1","questionImagePath":null,"position":null,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":487849,"quiz_id":"24964","answer_id":null,"answerType_id":"0","created_at":"2018-06-12 01:06:21","updated_at":"2018-06-12 01:06:21","questionName":"The SART operates correctly when interrogated by navigational radars with an antenna height of 15\r\nmeters at a distance of at least...","questionTimeSeconds":"0","questionTimeMinutes":"1","questionImagePath":null,"position":null,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":487854,"quiz_id":"24964","answer_id":null,"answerType_id":"0","created_at":"2018-06-12 01:09:46","updated_at":"2018-06-12 01:09:46","questionName":"Why is an antenna tuner required for MF-HF 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