PROB、TEMPO和PROB TEMPO

ICAO附件3 <1.4 Use of probability groups>

The probability of occurrence of an alternative value of a forecast element or elements should be indicated, as necessary, by use of the abbreviation “PROB” followed by the probability in tens of per cent and the time period during which the alternative value(s) is (are) expected to apply.
出现其他的预报元素的可能性,必要时可用“PROB”加上出现的可能性和出现的时间段来表示

The probability information should be placed after the element or  elements forecast and be followed by the alternative value of the element or elements.
这种可能性的报文,应该放在预报元素和其他预报元素之间

The probability of a forecast of temporary fluctuations in meteorological conditions should be indicated, as necessary, by use of the abbreviation “PROB” followed by the probability in tens of per cent, placed before the change indicator “TEMPO” and associated time group.
出现短暂浮动的气象条件的可能性,可用“PROB”加上出现可能性,放在“TEMPO”时间之前。

A probability of an alternative value or change of less than 30 per cent should not be considered sufficiently significant to be indicated.
如果出现其他气象值的可能变化少于30%,则不用表明这种变化

A probability of an alternative value or change of 50 per cent or more, for aviation purposes, should not be considered a probability but instead should be indicated, as necessary, by use of the change indicators “BECMG” or “TEMPO” or by subdivision of the validity period using the abbreviation “FM”. The probability group should not be used to qualify the change indicator “BECMG” nor the time indicator “FM”.
最后这段太拗口了,翻译不出来。

因此,PROB + TEMPO 连着出现的情况时,表示的是TEMPO出现的可能性,也就是间歇性出现的可能性。比TEMPO更弱。

消防等级的疑惑还没有答案

由于通告:

YBAS APT 2011031ED63V01 F2853/11 11 02APR0810/11 30APR0810
FIRE AND RESCUE AMD HR
MON 2340 TO 0810 CAT 6
TUE 2015 TO 2245 CAT 5
2245 TO 0810 CAT 6
0810 TO 1045 CAT 5
WED 2015 TO 2340 CAT 5
2340 TO 0845 CAT 6
0845 TO 1045 CAT 5
THU 2015 TO 2245 CAT 5
2245 TO 0810 CAT 6
FRI 2015 TO 2340 CAT 5
2340 TO 0810 CAT 6
SAT 2340 TO 0810 CAT 6
SUN 2340 TO 0810 CAT 6

发现消防等级好像降的很厉害,767需要8级,所以去查了一下标准

从ICAO附件14机场(2009年7月版)中有以下表格可以确定机型的消防等级:

又有一段说明:“where the number of movements of aeroplanes in the highest category normally using the aerodrome is less than 700 in the busiest consecutive three months,the level of protection provided shall be not less than one category below the determined category.” 说明消防等级可以下降一级。除此之外,我没有发现其他可以减少消防等级的说明。

可是签派手册(2010年4月修订)中除了有ICAO相同内容外,还有一条:“当组成700此活动中飞机尺寸有较大差别时,则该机场类别可再降低,比最高类别的飞机低不低于两级。”

根据以上这条我找到了:MH/T7003-1995 <民用航空运输机场安全保卫设施建设标准> “8.3 按飞机起降频率划分机场消防保障等级由下面原则确定…” , 此文件为行业标准。而且在CAAC的网站上只有1995版,而google上搜索有2008版。

我疑惑的是飞国际机场时, ICAO标准、公司手册、中国民航行业标准 究竟应该依据哪个?