The name Brother Islands comes from the company that electrified the lighthouse. The first lighting system had a strength of the equivalent of 5000 candles. The two islands are of volcanic origin and lie on a ridge that plunges well over 1000m to the west and east. The remains of the volcanic history can still be seen today in the basalt rock, which is clearly darker than the reef structure.
The Big Brother has a length of 200m and a width of 60m. It is almost perpendicular to the north-south direction and is a steep-walled reef except for the eastern plateau. On the island you usually have the opportunity to stretch your feet, smoke a shisha with the lighthouse keeper or buy small souvenirs and enjoy the view from the lighthouse. This can change depending on the mood of the military.
The wreck of the "Numidia" lies diagonally on the reef from 15m to 75m depth. The general cargo ship hit the west side in 1901 after a navigation error. Its cargo consisted of rails and railroad wheels. It is spread around the wreck. The overgrowth of the wreck stops almost abruptly at 40 meters.
The Numidia is one of the most beautifully overgrown wrecks in the world.
The "Aida", which nestles against the reef on the southern side at a depth of 30m to 65m, has been resting there since she ran aground on the fringing reef in rough seas in 1953. She was to bring personnel for the lighthouse and material for the island. Storms in early 2010 have left the wreck a bit battered.
Around the western end there is usually high wave and some current. If it is possible to dive there in the afternoon, you have the chance to see gray reef sharks and between the wrecks hammerhead sharks from time to time.
On the eastern plateau you can see thresher sharks, also gray reef sharks can be seen there very often. Further on the north side there are nice notches and the reef wall is beautifully covered with soft and hard corals. In addition there are all kinds of fish.
To the south is the jetty that supplies the lighthouse. On both sides you will find small notches in two to five meters depth with gigantic schools of fish, hunting flute fish, juvenile napoleons. In the open water area, hunting mackerels, tunas and barracudas often pass by.
- Route planning at Big Brother is easy, because the current gives the direction. In spring you have to expect high waves there. The currents at the points, which are approached by the Zodiacs to drop off the divers, are not to be underestimated and you should think of your ENOS. Here, actually, a speedy descent is always necessary. Otherwise you may be carried away by the surface current.