Fishing Grounds of the Gulf of Maine

Blue Clay Ground also called Southeast Ground. This bears S. by E. from Boon Island. from which it is distant 8 miles. The form of the ground is roughly square and is from 4 to S miles across. Depths here range from 30 on the shoalest parts to 60 fathoms, the bottom being of tough blue clay. The water deepens suddenly on the muddy ground all about it.

It is one of the best winter haddock grounds in this vicinity, particularly the eastern edge, which is much resorted to by haddock trawlers from January through March, when this species is most abundant here. It is a good winter cod ground, also.

A long, narrow strip of hard bottom, separated from the Blue Clay by a narrow mud gully of somewhat greater depth, is called the Prong. Depths here run from 30 fathoms on the inner parts to 70 fathoms offshore. This piece furnishes a very suitable bottom for operating gill nets and is much visited by this type of craft. The Prong lies S. by E. from Cape Porpoise 17 miles.

Marks: Bring Acre Hill in line, Notch of Agamenticus at the distance from Cape Porpoise just given. From the Isle of Shoals the Prong is distant 10 miles SE. by E.