Block 1 (entry): one machine gun embrasure planned but not installed.

Block 4 (observation): one observation cloche, two machine gun embrasures.

Block 4 (not built): infantry casemate with two twin machine gun embrasures.

Block 6 (infantry block): two heavy twin machine gun embrasures.

The advanced post is a small blockhouse with three machine gun embrasures.

The advanced post of Aiguille Noire is a short distance to the south, with four machine gun embrasures.

A fourth block was planned as a casemate with two heavy machine gun embrasures, but not built.

Block 1 (entry, not completed): two machine gun embrasures, never armed.

Block 2 (entry): one light machine gun embrasure.

Block 2 (infantry): one machine gun embrasure, protects Block 1.

Block 1 (entry): one machine gun embrasure planned but not installed.

Block 4 (observation): one observation cloche, two machine gun embrasures.

Block 4 (not built): infantry casemate with two twin machine gun embrasures.

Block 6 (infantry block): two heavy twin machine gun embrasures.

The advanced post is a small blockhouse with three machine gun embrasures.

The advanced post of Aiguille Noire is a short distance to the south, with four machine gun embrasures.

A fourth block was planned as a casemate with two heavy machine gun embrasures, but not built.

Block 1 (entry, not completed): two machine gun embrasures, never armed.

Block 2 (entry): one light machine gun embrasure.

Block 2 (infantry): one machine gun embrasure, protects Block 1.