Planned maintenance — 19th January 2018 12:00 to 22nd January 2018 14:00 [more]

Cruise inventory

RV Edward Forbes 20/74

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Edward Forbes (74EF)
Cruise identifier20/74
Cruise period1974-10-09 — 1974-10-24
Port of departureSouthampton, United Kingdom
Port of returnSouthampton, United Kingdom
ObjectivesUsing electromagnetic flowmeters supported on the seabed mounted rig it was hoped to investigate the structure of turbulence, the turbulent intensities and Reynolds stresses near the sea bed. Simultaneous measurements with rotor flowmeters of the velocity profile would enable comparative values of bed shear stress and roughness length to be obtained. The attitude of the rig would be assessed using an inclinometer and the performance of the lowermost sensors, and perhaps sediment movement also, monitored using an underwater television. Experiments would also be carried out with a sand transport probe and measurements of self-generated noise completed.
Because previous attempts at measurements on this programme in the RR John Murray were unsuccessful, due to the movement of the ship around a single anchor, this cruise was planned anchoring stern-to some large mooring buoys at Yarmouth Roads in the Solent. By this means it was hoped that the movement of this ship would be reduced to an acceptable amount.
Chief scientistKeith Dyer (Institute of Oceanographic Sciences Taunton)
Cruise reportRV Edward Forbes 20/74 cruise report edward_forbes20_74.pdf — access key 'C' (0.19 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
Bristol Channel
Physical oceanography 
Current metersDescription: flow measurements