The format is as described in ICAO Doc 8126 section 5.5.2 bullet d):
In the indication of the geographical coordinates of
a location:
- the latitude should be given first;
- symbols for degrees, minutes or seconds should
be omitted;
- two digits should always be used in expressing
values of less than 10 degrees of latitude; and
- three digits should always be used in expressing
values of less than 100 degrees of longitude.
For example, 050735N 0652542W means five
degrees, seven minutes and thirty-five seconds
North, sixty-five degrees, twenty-five minutes and
forty-two seconds West.
What is typical in AIP pubblications is the additional part
of decimal seconds, like 554718.23N
.
Details
This format is used in AIP pubblications, for examples for runway threshold
coordinates, stand positions, etc.
This is used also in ALL_FT+
files from NM.
See also
Other coordinates:
ddm2dd()
,
dms2dd()
,
parse_lat_icao()