The search for two light aircraft that went missing in George's Valley, Limpopo, would continue on Monday, says Search and Rescue SA.
"We are now briefing pilots as to the search pattern and they will begin searching as soon as possible," said spokesman Johnny Smit.
He said overnight foot patrols had searched in Tzaneen for the two planes which went missing while flying to Gauteng after an airshow there.
The planes took off from a landing strip in Tarentaal, a small farming community in Tzaneen, on Sunday and were headed to Rand Airport in Germiston.
The Albatross planes, carrying six people each, were presumed to be in the George's Valley area, between Polokwane and Tzaneen, Mopani District Municipality spokeswoman Mashadi Mathosa said on Sunday.
"There is a joint search operation to find the planes... George's valley is a mountainous area so we are concerned."