Cruise inventory

RRS Discovery D46_leg3

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD46_leg3
Cruise period1972-05-25 — 1972-05-30
Port of departurePlymouth, United Kingdom
Port of returnBarry, United Kingdom
ObjectivesLeg 3 of 3 of D46

1) Improvements to the suite of routine meteorological sensors on board
2) Preliminary work on cloud cover photography and balloon following in connection with the forth coming JASIN expedition
3) Test of the telesounder equipment to check the accuracy of the bathymetric measurements under good conditions
Chief scientistM J Tucker (National Institute of Oceanography)
Cruise reportRRS Discovery D46_leg3 cruise report d46.pdf — access key 'C' (0.99 MB) 
Ocean/sea areas 
GeneralBristol Channel
SpecificStart Bay, Tor Bay, Mevagissy Bay, Eddystone, Dodman Point, area between Scillies and Lands End
Track chartsRRS Discovery D46_leg3 cruise track — d46track_leg1.pdf (0.02 MB) 
Other meteorological measurementsQuantity: activity duration in hours = 65
Description: Recording was started at 1935GMT on the 27th May and continued until 1221GMT on the 30th May of the f.m thermometers installed at various points on the ship. They were recorded on a 5-chnnel counter-logger. The accumulated one second count was sampled at one minute intervals, and the time of each observation was also logged.Spot checks of the output frequencies were made at intervals throughout the recording time.
Geology and geophysics 
Long/short range side scan sonarQuantity: number of surveys = 3
Description: 38 kHz side-scan sonar survey carried near the Manacles area, between Dodman Point and the Eddystone, and Scillies and Lands End.