DEEP: Long Island Sound Trawl Survey - Spring and Fall 2012


April 13, 2012

Subject: Long Island Sound Trawl Survey – Spring and Fall 2012

Monthly trawl survey maps showing the locations of monthly trawl survey sites to be sampled during 2012 from the R/V John Dempsey have been posted on the DEEP's website. Lines on the map give the direction and distance of each tow. For the exact start and end of each tow, please refer to the accompanying tables using the reference number for each tow printed on the map. The tables have the reference number, LORAN TD & Lat/Lon coordinates at the start and end of each tow, trawl survey site number, and description of the tow (for example: East-West Tow). Although the U.S. Coast Guard has ceased broadcasting Loran TDs in February 2010, we will continue to provide the historical TDs for each tow for the convenience of those more familiar with that coordinate system. However, TDs are approximate and should be used as a rough guide only. Tows are now conducted using the Latitude and Longitude coordinates.

This includes site maps and tables for the spring and fall 2012 Long Island Sound Trawl Survey. In the past, we sent monthly reminders, however, we have reduced our mailings to two times per year; once in the Spring and once in the Fall. This will be your only notice for the April, May and June Surveys. Check the maps for each month to see the dates the trawl survey is scheduled to occur. We will send a reminder a couple weeks prior to the beginning of the September survey with the maps for both September and October.

This Notice along with the accompanying maps and tables will also be posted on the DEEP website as a PDF document (go to and click on COMMERCIAL in the left column, then click the link for Monthly Trawl Survey Maps).

We are providing this information in order to avoid accidental disturbance of your gear and to maintain the integrity of our survey so that we can continue to provide the best possible monitoring of the Sound’s fishery resources. For this effort to be successful we need your cooperation by removing any gear you have within one-half micro second to either side of the survey line for the duration of each month’s survey. Provided gear is set in an orderly fashion, this space -- about 500 ft -- is an adequate width for towing the relatively small net used in the survey.

Your cooperation in providing a clear path for sampling is greatly appreciated. This survey continues to provide needed information for assessments of Long Island Sound fish and lobster resources.

Each month, the survey is expected to begin in the east and progress westward. It generally takes 10-12 days of good weather (each month) to complete the survey. You can reach R/V John Dempsey at 860-490-3275 or on VHF CH 16 & 13 anytime the vessel is on the water. The crew can tell you at any time during the survey period what sites have been done and approximately when sites in a given area will be sampled. We hope this communication can minimize the amount of time your gear will have to be moved.

Again, we appreciate your cooperation. Please contact David Simpson at the Marine Fisheries Office in Old Lyme, CT if you have questions on the survey or the schedule for sampling in your area.