zz = depth below sea/water surface (m)

tt = sea/water temperature (degree Celcius)

ss = salinity (part per thousand)

dc = direction of current (degree)

vc = speed of current (m/s)

Output:
<file>
buoy_id=62775
obstime=2011-08-26 04:30:00
lon=-2.28300
lat=43.71240
n=1
zz=0
tt=22.21

buoy_id=52087
obstime=2011-08-26 00:00:00
lon=136.49274
lat=7.86594
n=1
zz=0
tt=28.90
n=2
zz=2
tt=28.90
ss=33.46

...

n=13
zz=750
tt=5.97
ss=34.51

buoy_id=31051
obstime=2011-08-26 04:00:00
lon=-44.92644
lat=-25.28061
PW=13
HW=2.6
n=1
zz=0
tt=21.24
n=2
zz=7
dc=206
vc=0.4
n=3
zz=30
dc=21
vc=0.4
n=4
zz=55
dc=205
vc=0.4
</file>