Blockhaus are located south of the bay, after the Pyla dune and just befor the Petit Nice beach. There are a lot of underwater Blokhaus in the area, located into two diferent places: Gaillouneys and Sablonneys. Access is usually done by boat or by 4WD, some courageous divers walk by the shore.
Most dived are 3 big blockhaus from World War 2 named the net, the conger and the passage (distance from one to another is between 30 to 50m). They slept from the beach into the chennal.
Take care if you enter into some of them ! There are som big conger eels and some time european lobsters.
Les blockhaus, France
By chris, 2008-06-01 15:00:00 Tank & Conger
Nitrox dive (32%) to test the new Canon G9 + housing + YS27DX strobe. We were on 'La citerne', then 'Le congre'. I shot a very nice picture of torpedo ray (with bothe the eyes and the mouth!).
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The Gallouneys Blockhaus
The dive on the blockhaus is quite interesting when tide coefficients are low. One mustn't forget that we are at the entrance of the Arcachon lagoon and therefore, the dive is only possible at tide slack due to the strong currents in this area. The water is often murky but will still be able to see enormous conger eels, spider crabs, rays and, for the lucky, the to rare lobster. The blockhaus are scattered on a 200 to 300m area and one can easily visit 3 to 5 of them in the same dive, due to their shallow depths (3 to 20m). Finally, an excellent map op the area can be purchased from the local diving shops; it shows the GPS ordinates, depth, directions, distances and type of each of the 17 blockhaus found on this spot.
comment by Anonymous, 2006-10-09 12:17:05