=IF(Tide<>"";
IFs(Tide<TIMEVALUE("6:30");"--";
And(Tide>=TIMEVALUE("6:30");Tide<TIMEVALUE("11:00"));"Parking: 08:00";
And(Tide>=TIMEVALUE("11:00");Tide<=sunset-Timevalue("0:00"));"Parking: "& Text(Timevalue(round(Tide*96)/96-"3:00");"hh:mm");
Tide>sunset-Timevalue("0:00");"--")
;"")