the sound. I saw one boom on a ten or 15 foot plunge but the sound was weak. Other times the plunge must have been twelve short of 100 ft. However while feeding along the dive was usually 40 or 50 ft. The angle of the deeches always to be about 75 with the ground, the turn is always fairly curved and the accent 75 degrees for 20 ft then more gradual. The bird seems to usually turn about 15 ft from the ground although it may be more as when feeding or possibly lower. This bird I believe was nesting here. I shall try to return by daylight, sometime. Nevertheless there was another bird way up close about but it performed once or twice rather quickly. Apparently the bird dive over the ground at the west and were from the best dive. But when traveling along feeding the go like a purpose