I am glad that you put this information together in a systematic protocol (Global FAST®). I found the material to

Figure. Gator Sign Orientation.  The rounded ribs are likened to the eyes, and the bright white hyperechoic “Lung Line” or

TFAST® and Its Use for the Accurate Diagnosis of Pleural and Pericardial Effusion For our FASTVet Table 1 in PDF form,