the float is parked at a certain depth (the Argo operations centre recommends
1000 m), descends to 2000mevery 10 days to start the
temperature and salinity profile, comes to the surface, transmits
its data and returns to its parking depth. In the beginning
of 2006, 46% of floats profile to around 2000m and 66% profile
to depths greater than 1500 m.