Official notifications issued by the Hydrographer giving information concerning corrections to charts issued and other matters of importance to safe navigation.
Lulwaziso olusesikweni olukhutshwa yi-hydrographer enikezela ngolwazi olubhekiselele kwizilungiso zetshati ezikhutshiweyo neminye imiba ebalulekileyo kuhambo ngolwandle olukhuselekileyo.