Field Activity 1989-010-FA

Identifier 1989-010-FA
Alternate names LIMNOS-89-1
Purpose To collect marine gravity and bathymetry data on Lake Huron and Georgian Bay at a 5 nm line spacing in the east-west direction. This survey is in support of the GLIMPCE Project. The proposed survey covers 3,400 nm in the 14 day period.
Location Lake Huron, Georgian Bay, Great Lakes, Canada, North America;
Summary The CSS LIMNOS departed Sarnia, Ontario, Canada on 13 May 1989 at 1300Z (0900 local). On 19 May 1989 the ship stopped in Goderich, Ontario, Canada for a mid-cruise gravity land station tie and departed after 4 hours. The cruise ended back in Sarnia, Ontario, Canada on 26 May 1989 at 1815Z (1415 local). Both sea gravity meters were run and compared continuously in real time by the navigation and gravity logging system. The only major problems encountered were on the 24th and 25th of May while in Lake Michigan. The weather turned bad and the LORAN-C chain went off the air for scheduled repairs. Consequently, lines J5, J6 and J7 are of lower quality. A total of 3030.4 nm were steamed in 13 days, of which 2450.3 nm were surveyed miles. The cruise unadjusted crosscheck statistics were 1.3 mgals rms for 55 points with a mean of 0.2 mgals.
Comments Between the start and end port of Sarnia, Ontario, Canada, the vessel stopped at Goderich, Ontario. Project = GLIMPSE Project, GLIMPSE Project
Platform
Limnos
Length 44.8 metres (147 ft); beam 41.6 metres (136 ft).
Itinerary
Start Sarnia, Ontario, Canada 1989-05-13
End Sarnia, Ontario, Canada 1989-05-26
Days in the field 14
Bounds
West -85.233
East -79.01367
North 46.20848
South 43.26121

Personnel

Organization
384 Woods Hole Road
Quissett Campus
Woods Hole, MA02543-1598
(508) 548-8700
Principal investigators Barry J Irwin
Crew members
Barry J Irwin
Scientist, Staff
Lubinski, Dave
Scientist, Staff
George R. Driscoll
Scientist, Staff
Affiliate staff GSC: Roy Cooper, Bryne Hearty, Jack Wilson, Rick Beach

Data types and categories

Data category: Electro-Magnetic, Sonar, Location-Elevation
Data type: Gravity, Single Beam, Navigation

Documents: Notes and log books

Name Description
Cruise report Chief Technician's report including personnel, purpose, equipment, and brief cruise narrative.

Equipment used

Equipment Usage description Data types Datasets
Gravity meter (wh) Gravity (no data reported)
Echosounder Single Beam 1
TI-4100 GPS Navigation (no data reported)
GPS (wh) Navigation (no data reported)
LaCoste-Romberg gravimeter G-179 Gravity (no data reported)
Loran-C Navigation (no data reported)

Datasets

Datasets produced in this activity

Dataset name Equipment Description Dataset contact
1989-010-FA-SE-001 Echosounder microfilm of CANADIAN DATA Nancy K. Soderberg

Publications

Samples collected during this field activity