TABLES 



131 



CODE TABLE 30 



Meteorological Q-Code Signals 



Meteorological Q-code signals are reproduced below as a guide to ship's officers in furnishing meteorological 

 data when requested by aircraft. Note that when these signals are used in replies, the message may require some 

 additional (supplementary) information to convey clearly meteorological data that cannot be presented in the 

 order, units, etc., specified in the following list. 



Signal 



Question 



Reply 



QAM 



QAN 



QAO 



QBA 

 QFC 



QFF 

 QFV 



QMU 

 QNY 



QTI 

 QUB 



QUH 

 QUK 



What is the latest available meteoro- 

 logical observation for (place)? 



What is the surface wind direction (in 

 degrees relative to MAGNETIC 

 North, unless otherwise indicated in 



the question) and speed at 



(place)? 



What is the wind direction in degrees 



TRUE and speed at (position or 



zone/s) at each of the (figures) 



(vmits) levels above (datum)? 



Note. — Merchant ships can be ex- 

 pected to furnish wind data onlv for 

 the level near the SURFACE' (sea 

 level). 



What is the horizontal visibility at 



(place)? 



What is the amount, the type, and the 



height above (datum) of the base 



of the cloud at (place, position 



or zone)? 



[At (place)] what is the present 



atmospheric pressure converted to 

 mean sea level in accordance with 

 meteorological practice? 



Please report the present meteorological 

 landing conditions [at (place)]. 



What is the surface temperature at 



(place) and what is the dew-point 



temperature at that place? 

 What is the present weather and the 



intensity thereof at (place, 



position, or zone)? 



What is your TRUFj track? 



Can you give me, in the following order, 

 information concerning visibility, 

 height of clouds, direction and veloc- 

 ity of ground wind at (place of 



observation)? 



Will you give me the present baro- 

 metric pressure at sea level? 



Can you tell me the condition of the 

 sea observed at (place or co- 

 ordinates)? 



Meteorological observation made at (place) at 



hours was as follows 



When the reply is presented in the Q-code form, the 

 sequence of information is to be, as far as practicable, 

 that pertaining to the Q-signal sequence QAN, QBA, 

 QNY, QMU. When presented in this .sequence, it is 

 not necessary to precede each type of datum with the 

 corresponding Q-signal. 



The surface wind direction and speed at (place) 



at hours is (direction) (speed figures and 



units). 



Note. — Unless otherwise indicated in the question, 

 answer (or advice), surface wind direction is given in 

 degrees relative to MAGNETIC North. 



The wind direction and speed at (position or zone/s) 



at the following heights above (datum) is: 



(vertical distance in figures and units) 



degrees TRUE (speed in figures and units) 



(vertical distance in figures and units) 



degrees TRUE (speed in figures and units). 



hours 



The horizontal visibility at (place) at 



is (distance figures and units). 



At (place, position, or zone) the base of the cloud 



is eighths type at (figures and vmits) 



height above (datum). 



Note. — If several cloud layers or masses are 

 present, the lowest is reported first. 



At (place) the atmospheric pressure converted 



to mean sea level in accordance with meteorological 



practice is (or was determined at hours to be) 



__. tenths of millibars (e. g., 9237 for 923.7 millibars). 



The present meteorological landing conditions at 



(place) are When the reply is prepared in the 



Q-code form, the sequence of information is to be, as 

 far as practicable, that pertaining to the Q-signal 

 sequence Q.\N, QBA, QNY, QMU. When presented 

 in this sequence, it is not necessary to precede each 

 type of datum with the corresponding Q-signal. 



The surface temperature at (place) at hours 



is degrees and the dew-point temperature at that 



time and place is degrees. 



The present weather and intensity thereof at (place, 



position, or zone) at hours is (duststorm, sand- 

 storm, rain, snow, hail, thunderstorm, etc., or if no 

 such phenomena as these is present, signal QNY NIL). 



My TRUE track is degrees. 



Here is the information requested 



The present barometric pressure at sea level is (units) . 



The sea at (place or co-ordinates) is 



