From Simple Modern Sewing:
These three dresses all have the same flattering neckline, which is called a boat (or bateau) neckline because its simple shape resembles the bottom of a boat. The gentle curve shows off your neck and collarbone. This dress also features a lapped shoulder, which is only stitched on the outer edge, so you can get in and out of the dress easily without needing to add a zipper. Try this pattern with different fabrics and pair it with your favorite accessories to create a look for every occasion.