If you are obliged to leave the place from which you can see out-in order, for example, to look at the chart-make sure that someone else is doing so for you.
Ukuba kuye kwafuneka ukuba uhambe kulendawo apho ubona ngaphandle nangaphakathi kwimiyalelo, umzekelo, ukujonga ekwenzeni kwetshati qinisekisa ukhona omnye okujongelayo.