biological and chemical, with the proper chain of custody forms were delivered to the US 

 Army Corps of Engineers, New England Division (NED) laboratory where the samples 

 were archived. 



2.3 Navigation 



Navigation for the survey was provided by an SAIC Portable Integrated Survey 

 System (PINSS). The PINSS is a PC-based system that receives navigation data, 

 mathematically weights these signals based on signal strength (via a Kalman filter), and 

 calculates both the position of the ship and the position error. The PINSS was interfaced 

 to a Magnavox MX4200 Global Positioning System (GPS) with a Magnavox MX50R 

 Differential-GPS (DGPS) receiver for vessel positioning with an accuracy of ±5 m. 



Monitoring Cruise at the Historic Boston Lightship Disposal Site, August 1994 



