Cruise inventory

RRS John Murray JM5/68 Leg 2

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS John Murray (74MJ)
Cruise identifierJM5/68 Leg 2
Cruise period1968-04-24 — 1968-05-06
StatusCompleted
Port of departurePlymouth, United Kingdom
Port of returnPlymouth, United Kingdom
PurposeResearch
ObjectivesGenerally to investigate the geological nature of the sea-floor. More specifically:

1. Examine Hurd Deep to determine possible mode of origin
2. Continous seismic profiles and magnetometer traverses to collect data on sub-surface geological structure - 50° 10'N, 2degW and 4degW
3. Sample surface sediments at selected sites inshore and in the open sea
4. Continous seismic profiles and magnetometer traverses west of 5degW
5. Detalied bathymetric survey of lower submarine canyon system
6. Gain experience in laying bottome current meter stations
Chief scientistDouglas Hamilton (University of Bristol Geology Department)
Cruise reportRRS John Murray JM5/68 Leg 2 cruise report john_murray5_68.pdf — access key 'C' (0.29 MB) 
Ocean/sea areas 
GeneralEnglish Channel
Celtic Sea
SpecificWestern English Channel and southern Celtic Sea
Measurements 
Physical oceanography 
Current metersQuantity: number of recoveries = 1
Description: buoyed
Current metersQuantity: number of deployments = 1
Description: buoyed
Biology and fisheries 
PhytoplanktonQuantity: number of stations = 1
Description: plankton sampling
ZooplanktonQuantity: number of stations = 1
Description: plankton sampling
Gear researchDescription: sparker testing continued
Geology and geophysics 
GrabDescription: core, Shipek and Murray sediment samples taken
Core - soft bottomDescription: core, Shipek and Murray sediment samples taken
Bottom photographyQuantity: number of stations = 2
Description: underwater camera tested
Single channel seismic reflectionQuantity: number of surveys = 6
Description: sparker and magnetometer surveys
Magnetic measurementsQuantity: number of surveys = 6
Description: sparker and magnetometer surveys