Cruise inventory

RV Farnella 3/85

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Farnella (74AE)
Cruise identifier3/85
Cruise period1985-10-02 — 1985-11-02
StatusCompleted
Port of departureTampa, United States
Port of returnSan Juan, Puerto Rico
PurposeResearch
ObjectivesSecond year of a six-year co-operative research programme between the United States Geological Survey (USGS) and IOS to survey the exclusive economic zone (EEZ).

GLORIA sonar coverage of US EEZs in the Gulf of Mexico and off Puerto Rico (also part of Cayman Trough). Also, single channel seismic reflection profiles with 80 or 160 cubic inch airgun, 3.5kHz high resolution profiles and 10kHz narrow beam echo-sounding profiles recorded, along with continuous magnetic anomaly profiles.

Objectives:
Leg 3 was split into two parts. The first wholly devoted to the completion of GLORIA cover of the Gulf of Mexico. The second part would include short reconniassance surveys of the Cayman Trough and the Hispaniola Basin during an extended passage line between Key West and Puerto Rico.
1. To complete the survey of the West Florida Escarpment and to examine the processes both past and present contributing to the morphology of the shelf and slope.
2. To complete the GLORIA cover of the Walker-Massingill slide, a submarine failure of the mid and lower Mississippi Fan identified in earlier GLORIA work.
Chief scientistDavid C Twichell (United States Geological Survey Center for Coastal and Marine Geology), Lindsay M Parson (Institute of Oceanographic Sciences Wormley Laboratory)
ProjectGLORIA studies of the exclusive economic zone
Coordinating bodyUSGS and IOS
Cruise reportRV Farnella 3/85 cruise report farnella1to4_85.pdf — access key 'C' (0.59 MB) 
Ocean/sea areas 
GeneralCaribbean Sea
Gulf of Mexico
SpecificGulf of Mexico and off Puerto Rico
Track chartsRV Farnella 3/85 cruise track — farnella1to4_85track.pdf (00 MB) 
Measurements 
Geology and geophysics 
Single-beam echosoundingQuantity: number of surveys = 1
Description: Leg A: 10kHz echosounder deployed
Long/short range side scan sonarQuantity: number of surveys = 1
Description: Leg A: 3.5 fish deployed
Long/short range side scan sonarQuantity: number of surveys = 1
Description: Leg B: 3.5kHz fish deployed
Single channel seismic reflectionQuantity: number of surveys = 1
Description: Leg B: GLORIA profiler was used
Single channel seismic reflectionQuantity: number of surveys = 1
Description: Leg A: GLORIA profiler was used.
Magnetic measurementsQuantity: number of surveys = 1
Description: Leg B: magnetometer