hold bulkhead

They did so, sitting cross-legged in a circle on the hold bulkhead.

This bulkhead formed the "holding bulkhead" and it was designed to resist the residual blast effects from the torpedo hit.

In the case of the fourth, the SPS holding bulkhead appeared intact abreast the area where the hull was hit.

Such a second bridge would have to be near either the draft animals or near the oxygen furnaces, and he had concluded that the animals were between the hold bulkhead, where their noise could be shielded off.

If this final inner bulkhead was penetrated a further set of subdivided compartments would contain any leaks; inboard of the holding bulkhead the ship was highly subdivided into small compartments containing auxiliary machinery spaces.

The innermost bulkhead is commonly referred to as the holding bulkhead, and often this bulkhead would be manufactured from high tensile steel that could deform and absorb the pressure pulse from a torpedo hit without breaking.

It consisted of a sandwich of void spaces, light bulkheads, liquid loading compartments or compartments filled with a rubber-based water-excluding compound (ébonite-mousse), and a heavy internal holding bulkhead to absorb the explosion of a torpedo head.

These included a partial cargo of hastily purchased items to provide them with a real manifest in which to embed the false, and supplies needed for rearranging the cargo hold bulkheads, flung aboard to wait the actual work to be done en route.

One of these hits, fired from Bismarck, had penetrated the torpedo protection outer bulkhead in a region very close to an auxiliary machinery space causing local flooding within the SPS, while the inner, 1.5-inch ( 2x19 mm) D-steel holding bulkhead, however, remained intact, as the German shell was a dud.