Sin Chung Kai's blog - Former Legislative Councillor (Information Technology)

Friday, December 30, 2005

推廣「第九頻道」保障遠足安全

本地郊野風光明媚,加上香港人越來越注重健康,到郊外遠足舒展骨骼,實在是適合一家大小的「家庭日」好節目。縱然郊遊是有益身心的活動,不過事前準備工作實在不能看輕,尤其是用作通訊和緊急求救的裝備。

在香港某些郊外地區,本地流動電話網絡的接收情況不太理想。例如在大嶼山西南部、離島東平洲、西貢大浪等遠足熱門地點,流動電話只能接收非常微弱的信號,甚或不在本地網絡覆蓋範圍之外。若郊遊人士一旦發生意外或在路途中失散,又不能利用流動電話作緊急通訊和求救,實在非常危險。在本文執筆之日,正有兩名少年在西貢行山時失達六小時。他們的友人無法接通二人的流動電話,最終要請警方、消防處和民安隊派出大批人員登山搜索方能尋回二人。而在過去數月內,類似的行山遇險的個案時有發生,惹來公眾和遠足人士的關注。

其實,除了流動電話外,遠足人士還可以利用手提無線電對講機作為郊遊時的通訊工具。根據現行法例,市民毋須向電訊管理局申領牌照,也可以在409.74-410兆赫頻帶使用有效發射功率不超過0.5瓦特的手提無線電對講機作短距離(約2-3公里)的通訊。對於到流動電話網絡覆蓋範圍以外的郊野地區遠足的市民,這通訊設備算是相當適合不過。此外,電訊管理局正就開放「市民波段」(Citizen Band)進行第二階段公眾諮詢,建議開放26.96-27.41兆赫頻率,讓公眾人士同樣毋須申請,也可使用有效通訊範圍較409兆赫無線電對講機更大、一般超過5-6公里的「市民波段」對講機。若開放「市民波段」能夠成事,相信更能照顧郊遊人士的通訊需要,便利公眾。

縱然遠足人士有無線電對講機可使用,但他們又可如何透過無線電通訊作緊急求救呢?現時多個有開放無線電頻譜作供公眾使用的國家,如英國、美國、澳洲,當地有關規管機構皆規定「第九頻道」(Channel 9)作為緊急救援的專用頻道。早前,我曾在立法會上向政府提出質詢,喜悉電訊管理局也鼓勵使用409兆赫對講機的市民以第九頻道作為緊急通訊頻道;至於即將推出的「市民波段」,當局更打算明文規定第九頻道只作為緊急求救用途。

為讓無線電對講機的使用者有一個有效的求救渠道,有關規定第九頻道用途的建議,實在值得支持。然而,由於行山遠足很多時候也是一家大小或友儕之間的活動,這類遠足人士不一定能夠接觸業餘無線電會或行山╱遠足組織的資訊,又或懂得透過這些團體學習使用第九頻道的方法。因此,當局的公眾教育工作則更見重要。除了透過一些行山╱遠足組織,鼓勵他們的會員守望相助,不時收聽第九頻道外,當局應要更積極與電視電台、售賣遠足用品╱無線電對講機的零售商、地區組織等合作,教導公眾正確使用409兆赫對講機或將會開放的「市民波段」的第九頻道的方法,才能為遠足郊遊人士提供更大的保障。

(本文已於2005年12月30日刊於文匯報"單刀直入"專欄。)

78 Comments:

  • 單仲偕先生,

    你好,本人是理工大學的電腦系學生。對於你所講及的「市民波段」(Citizen Band)甚有興趣,跟我現時研究如何使用無線感應網絡使用在拯救失蹤行山人士有很多相似的地方,但我對「市民波段」的認識不多,亦不知道政府在此項目上有多少支援,請問可以在那裡找到相關的資訊呢?

    謝謝!
    大學生

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