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Using GMDSS 使用GMDSS

外贸人Amber

2025-10-23

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Using GMDSS

使用GMDSS

Urgency communications procedure

紧急通信程序

In a terrestrial system, urgency communications consist of an announcement, transmitted using digital selective calling, followed by the urgency call and message transmitted using radiotelephony, narrow-band direct-printing, or data.

在地面系统中，紧急通信包括一份通告，使用数字选择性呼叫发送，随后是使用无线电话、窄带直接印字或数据发送的紧急呼叫和电文。

The announcement of the urgency message shall be made on one or more of the distress and safety calling frequencies specified, using either digital selective calling and the urgency call format, or if not available, radio telephony procedures and the urgency signal.

紧急电文的通告应在指定的一个或多个遇险和安全呼叫频率上发送，使用数字选择性呼叫和紧急呼叫格式，或者若不可用，则使用无线电话程序和紧急信号。

A separate announcement need not be made if the urgency message is to be transmitted through the maritime mobile-satellite service.

如果紧急电文是通过海事移动卫星业务发送，则无需单独发送通告。

Ship stations not equipped for digital selective-calling procedures may announce an urgency call and message by transmitting the urgency signal by radiotelephony on the frequency 156.8 MHz (channel 16), while taking into account that other stations outside VHF range may not receive the announcement.

未配备数字选择性呼叫程序的船舶电台，可以通过在156.8 MHz（频道16）频率上使用无线电话发送紧急信号，来通告紧急呼叫和电文，同时需考虑到在VHF范围以外的其他电台可能无法收到该通告。

In the maritime mobile service, urgency communications may be addressed either to all stations or to a particular station. When using digital selective calling techniques, the urgency announcement shall indicate which frequency is to be used to send the subsequent message and, in the case of a message to all stations, shall use the "All Ships" format setting.

在海上移动业务中，紧急通信可以发送给所有电台或某个特定电台。当使用数字选择性呼叫技术时，紧急通告应指明后续电文将使用哪个频率发送，并且在发送给所有电台的电文情况下，应使用"所有船舶"格式设置。

Urgency announcements (urgency call) may be addressed to all ships, to selected group of vessels, to the specific ships, or to vessels in a defined geographical area or to specific coast station. The frequency on which the urgency message will be transmitted after the announcement shall be indicated in the DSC urgency call.

紧急通告（紧急呼叫）可以发送给所有船舶、选定的船组、特定船舶、或在限定地理区域内的船舶、或特定的海岸电台。通告之后将用于发送紧急电文的频率应在DSC紧急呼叫中指明。

The urgency call and message shall be transmitted on one or more of the distress and safety traffic frequencies specified in the table distress and safety frequencies.

紧急呼叫和电文应在遇险和安全频率表中指定的一个或多个遇险和安全通信频率上发送。

However, in the maritime mobile service, the urgency message shall be transmitted on a working frequency:

然而，在海上移动业务中，紧急电文应在工作频率上发送：

In the case of a long message or a medical call; or

当电文较长或是医疗呼叫时；或

In areas of heavy traffic when the message is being repeated.

在通信繁忙区域，当电文需要重复发送时。

An indication to this effect shall be included in the urgency announcement or call.

紧急通告或呼叫中应包含关于此情况的指示。

In the maritime mobile-satellite service, a separate urgency announcement or call does not need to be made before sending the urgency message. However, if available, the appropriate network priority access settings should be used for sending the message.

在海上移动卫星业务中，发送紧急电文前无需进行单独的紧急通告或呼叫。然而，若条件允许，发送电文时应使用适当的网络优先接入设置。

The urgency call format and the urgency signal indicate that the calling station has a very urgent message to transmit concerning the safety of a mobile unit or a person.

紧急呼叫格式和紧急信号表明呼叫电台有一份关于移动单位或人员安全的非常紧急的电文需要发送。

Communications concerning medical advice may be preceded by the urgency signal. Mobile stations requiring medical advice may obtain it through any of the land stations shown in the List of Coast Stations and Special Service Stations.

涉及医疗指导的通信可以冠以紧急信号。需要医疗指导的移动电台可以通过海岸电台和特别业务电台表中列出的任何陆地电台获取。

Urgency communications to support search and rescue operations need not be preceded by the urgency signal.

用于支持搜救行动的紧急通信无需冠以紧急信号。