

You will note that from the centre point, the inner circle, there are twelve lines drawn out to fixed points on the outside of the star. The vertical lines point to NORTH and SOUTH respectively while the
horizontal lines point to EAST and WEST respectively. The other lines, moving from NORTH clockwise, are each at 30?? distance from the preceding point and thus overall, the rose covers 000??, 030??, 060??, 090??, 120??, 150??, 180??, 210??, 240??, 270??, 300??, 330??.
For some inexplicable reason, the vast majority of naval ratings were never taught this and yet it is clearly documented in naval archives. Now you know !