north cardinal
flashing quick or very quick
south cardinal
6 flashes 1 long every 10 or 15 seconds
east cardinal
3 flashes every 5 seconds or 10 seconds
west cardinal
9 flashes every 10 or 15 seconds
isolated danger marks
white light group flash
safe water marks
white light isophase oculating 1 long or morse A
special marks
yellow
emergency wreck
yellow, blue alternating