A line drawn from the easternmost tower at Nahant, charted in approximate position latitude 42°25.4' N., longitude 70°54.6' W., to Boston Lighted Horn Buoy "B"; thence to the esternmost radio tower at Hull, charted in approximate position latitude 42°16.7' N., longitude 70°52.6' W.
33 C.F.R. §80.130