The D'ENTRECASTEAUX is SHOM's most important vessel. She began her act
ive service 25 years ago, and her specific equipment has evolved in li
ne with technological developments. In particular, in 1994, she was eq
uipped with two systems enabling her to make oceanographic investigati
ons while underway. These are an Acoustic Doppler hull-mounted Current
Profiler (ADCP) by means of which current profiles over an 800-metre
section can be obtained, and a towed vehicle (Sea Soar), able to oscil
late between 0m and 400m depths, which can carry sensors such as a CTD
probe or a fluorimeter. This article evaluates the present surveying
capacity of the D'ENTRECASTEAUX, with regard to hydrography, geophysic
s and oceanography and presents, in particular, her two new items of o
ceanographic equipment: the ADCP and the Sea Soar.