Discussion :: Airport Engineering  Section 1 (Q.No.2)
2. 
The bearing of the longest line of a wind rose is S 45° E, the bearing of the runway will be numbered 
[A]. 
135°  [B]. 
315°  [C]. 
13  [D]. 
31  [E]. 
both (c) and (d) 
Answer: Option E
Explanation:
No answer description available for this question.

Sri Ganesh said:
(Jun 20, 2015)


How to calculate? 
Merin said:
(Nov 21, 2015)


Divide its magnetic heading by 10, round it to the nearest whole number and you will usually get the runway number.
For example, if the magnetic heading is 345° then 345/10 = 34, 5.
So the runway number will be 35 which will be a runway used for landings (and takeoffs) to the north. 
Sahana said:
(Feb 24, 2017)


How it is 13 and 31? Explain it. 
Prabhu said:
(Mar 6, 2017)


S 45° E means 90 + 45 = 135 135/10 = 13.5 so its nearest value 13 and 36045=315 315/10= 31.5 near value 31. 
Varun said:
(Apr 18, 2018)


Thank you for explaining it. 
C. Sougoumarane said:
(May 19, 2018)


The difference between the runway number is always 18. 
Raj Kumar Budha said:
(Jun 7, 2018)


How to solve this? Please explain. 
Sameer Sopori said:
(Jul 16, 2018)


@Sahana.
The direction for both numbers 13 and 31 will be the same,
Just draw a line with 130° clockwise, and then draw the line 310°. You will see both are in the same direction in two opposite coordinates. 
Jegan said:
(Dec 16, 2018)


Thank you @Sameer. 
Priyakarthick said:
(Aug 4, 2019)


Why we dividing it by 10? 
Subhash said:
(Aug 12, 2019)


Why we divide it with 10? 
Shanmugam said:
(Nov 4, 2020)


The bearing of the longest line of a wind rose is S 45° E, the bearing of the runway will be numbered. 
Kamlesh Joshi said:
(May 18, 2021)


Runway numbers are determined by rounding the compass bearing of one runway end to the nearest 10 degrees and truncating the last digit. 
Sunil said:
(Sep 16, 2021)


Why to subtract 360 45°? 