Perfect for plotting radar targets, tidal current plots, and all relative motion problems. . . Solutions are reached through easy-to-plot vectors. Figure course to steer in a current, heading to avoid collision, or heading to intercept another moving vessel. . This is an exact copy of the government DMA 5089 plotting sheet which has been discontinued. Comes in a pad of 50 sheets-printed both sides. Size 13x13 inches. SW 1 lbs.