Definition
Topmark is two black cones point to point, giving the wineglass shape used as a memory aid. The body is yellow with a single broad black horizontal band. The light is white VQ(9) every 10 seconds or Q(9) every 15 seconds: nine flashes, remembered as nine o'clock for west. Because a west cardinal often marks the western edge of a shoal, the safe water lies westward and the mark is left to the east.
Want to apply this on the water?
Ask Saily out loud for an example, a scenario or a simpler explanation.
Talk to Saily