Cruise inventory

RRS Discovery D40

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD40
Cruise period1971-06-19 — 1971-07-26
StatusCompleted
Port of departureSouthampton, United Kingdom
Port of returnBarry, United Kingdom
PurposeResearch
Objectives1) Sea trials of GLORIA; Towing system and Acoustic experiments

2) Geological observations in the Eastern Mediterranean; GLORIA survey, Narrow beam echo-sounder profiles and the Mediterranean Ridge.

3) Side-scan Asdic survey

4) An investigation into the effects of the variation of the source-level in a deep water echo-sounder

5) Electrical interference on the RRS Discovery

6) A sound-velocity profile north of Cornwall.
Chief scientistA H B Stride (National Institute of Oceanography)
Cruise reportRRS Discovery D40 cruise report d40.pdf — access key 'C' (0.40 MB) 
Ocean/sea areas 
GeneralNorth Atlantic Ocean
Inner Seas off the West Coast of Scotland
Mediterranean Sea
Track chartsRRS Discovery D40 cruise track — d40track.pdf (00 MB) 
Measurements 
Physical oceanography 
Water bottle stationsDescription: T surface only
Meteorology 
Occasional standard measurements
Geology and geophysics 
In-situ seafloor measurement/samplingQuantity: 2
Description: acoustical properties
Single-beam echosounding
Multi-beam echosounding
Long/short range side scan sonar