To be a valid entry in a race or series of races on any day a boat shall Check Out prior to going afloat. Notices to competitors will be posted on the Official Noticeboard in the Lower Lounge. These may include shipping movements, tidal information and weather forecasts etc. Any change to the Sailing Instructions will be posted on the Official Noticeboard in the Lower Lounge before 1200 hours on the day it will take effect. The scheduled time of the warning signal for the first race each day is 1325 hours. The first start sequence of each day will be designated with the course diagram on the Official Noticeboard.