2. Horizontal Beam Width
probably the most revealing specification when it comes to the quality of a radar picture is horizontal beam width. A wide beam tends to display a less defined picture than a narrow beam does. Likened to an artist's paintbrush, the finer the brush or beam width, the more detailed will be the resulting picture. horizontal beam width on popular radar models can range anywhere from six degrees for more basic models to less than two degrees for higher-quality sets. however, in rough water, or aboard smaller boats, the advantages of narrow horizontal beam width can be negated by the fact that the signal tends to drop targets as the boat rocks and pitches, compared with a wider beam that tolerates greater angles of list and trim. Pick your poison.