Skip past header information
Skip USGS links group
U.S. Geological Survey - science for a changing world
MWRA Logo and link to MWRA Home Page  USCG Logo and link to USCG Home Page

Woods Hole Science Center

End of USGS links group

Time-series photographs of the sea floor in western Massachusetts Bay, 1996 - 2005 Skip navigational side bar


Instrument Deployments

During the USGS study, instrumented tripods were deployed and recovered at LT-A three times each year, typically in February, May or June, and September. This report presents photographs obtained during 19 deployments that took place during the period October 1996 through September 2005. The deployments are identified by a three-digit USGS mooring number that is assigned sequentially to all instrument deployments (table 2). The camera on tripods 632 and 708 failed to operate. Because of camera and strobe failures, systems were not available to be deployed on tripods 611, 645, 683, 697, and 756 (table 1).

Each tripod was located near the USCG Boston Approach B Buoy (National Ocean Service, 1997) on the southern flank of a ridge in water about 32 m deep (fig. 8). This location was selected for long-term observations because the USCG buoy marked the site and provided some physical protection from other marine activities.

Table 2. USGS mooring number, date, location, and water depth of time-series photographs contained in this Data Series report.

Mooring numberStart/Stop date Latitude (N) Longitude (W) Water depth (m)
480 October 1, 1996
February 9, 1997
42 22.74 70 46.84 31
495 February 17, 1997
June 10, 1997
42 22.63 70 47.07 31
501 June 10, 1997
September 23, 1997
42 22.63 70 47.07 31
507 September 23, 1997
November 12, 1997
42 22.64 70 47.0731
516 February 10, 1998
June 10, 1998
42 22.62 70 47.0831
530 June 17, 1998
September 30, 1998
42 22.62 70 47.0831
540 September 30, 1999
February 8, 1999
42 22.64 70 47.0931
552 February 10, 1999
May 7, 1999
42 22.64 70 47.0731
569 May 11, 1999
September 15, 1999
42 22.68 70 47.09 33
591 September 26, 1999
December 10, 1999
42 22.68 70 47.0931
625 May 13, 2000
September 11, 2000
42 22.69 70 47.09 30
638 February 14, 2001
May 24, 2001
42 22.68 70 47.0931
665 October 23, 2001
February 6, 2002
42 22.68 70 47.09 30
690 May 21, 2002
September 23, 2002
42 22.67 70 47.1031
717 September 24, 2003
February 1, 2004
42 22.68 70 46.0931
767 May 19, 2004
July 17, 2004
42 22.68 70 46.0931
775 September 22, 2004
January 27, 2005
42 22.72 70 46.8431
777 February 9, 2005
May 14, 2005
42 22.72 70 46.85 32
786 May 18, 2005
July 15, 2005
42 22.72 70 46.85 33

Click on thumbnail below for figure in PDF format.

Table 1. Chronological list of moorings deployed at LT-A in western Massachusetts Bay between 1989 and 2006, and citation for publications containing the time-series photographs Table 1.
Chronological list of moorings deployed at LT-A in western Massachusetts Bay between 1989 and 2006, and citation for publications. (HTML format; PDF format)

Figure 8. Map showing location of tripod moorings at LT-A in western Massachusetts Bay. Figure 8.
Location of tripod moorings (over-lapping red triangles) at LT-A in western Massachusetts Bay deployed from 1989-2005.

Jump to top of page
Return to the Instrumentation page.  Go to the Digitizing the Films page.

Adobe Reader To view files in PDF format, download free copy of Adobe Reader.

Skip Navigation

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USAGov logo U.S. Department of the Interior | U.S. Geological Survey

URL: woodshole.er.usgs.gov/pubs/ds-266/WEBPAGES/deployments.html
Page Contact Information: WHSC Webmaster
This page last modified on Monday, 14-Jan-2013 12:49:59 EST