Why would a P-3 be dropping sonobuoys IN THAT AREA ? What are Sonobouys used for ?
Sononbuoys are used for hunting submarines. Aircraft drop them, they deploy listening devices, and the aircraft listens for the sub and tracks it when it detects it. Why they would be dropping in that area is easy. The Navy has a major submarine base at Groton, CT. Subs transiting to and from Groton enter Long Island Sound from the eastern end and can be routed through W-105 or W-106. When subs are scheduled to be passing through the area then the P-3 squadrons out of Brunswick and occasionally Canadian squadrons out of Greenwood would often take advantage of it to do some training on a live target.