Ras Umm Sid is actually the name of the headland itself which is south of Naama Bay. The headland is covered with hotels and consequently it can be quite overrun by snorkellers and divers from the hotels. The headland has a number of dive sites, and the headland dive site is generally known as Ras Umm Sid.
The dive itself is a dive in two parts. Usually you enter the water between the distinctive rock on the beach and the pier. A quick drop down the wall and view the two distinctive ergs on the plateau. You will usually swim along the wall hitting about 27 metres, where you will come across a large shelter. A bit further you will hit the plateau and you will make yourself up the plateau to about 15 metres. At the bottom of the shore reef wall turn left and follow up to about 4 metres where there are a number of distinctive protrusions with some small caves and shelters.