Notice that for these BUFR messages (contained in IOB bulletins fetched from the GTS), the output from bufrdump.pl with **%%--%%obstype surface** is exactly as if option **%%--%%obstype** was not used at all. The reason is that these BUFR messages have data category 1 ('surface data'), while data sub-category is set to missing value, making it hard for bufrdump.pl to deduce that sub-surface data is also present without being explicitely told so.

Output:
<file>
buoy_id=62775
obstime=2011-08-26 04:30:00
type=Automatic
lon=-2.28300
lat=43.71240
height=0
TW=22.2

buoy_id=52087
obstime=2011-08-26 00:00:00
type=Automatic
lon=136.49274
lat=7.86594
height=0
DD=168
FF=7.4
TA=28.7
TW=28.9
UU=80
PR=1009.4

buoy_id=31051
obstime=2011-08-26 04:00:00
type=Automatic
lon=-44.92644
lat=-25.28061
height=0
DD=279
FF=0.0
TA=21.1
TD=19.8
TW=21.2
PR=1019.2
PW=13
HW=2.6
</file>