Photo:

deepsub.jpg

Description:

The bathyscaph is a deep water submarine used to explore the very lowest parts of the ocean. It is electrically powered. Once at the bottom, if the batteries or electrical system fail the best outcome would be for the sub to return to the surface. The designers made this outcome occur by holding the ballast in place with electromagnets. When power is lost, the ballast drops off automatically and the sub starts its ascent.

Categories:

Mistake-proofing category: mistake detection
Setting function: Physical
Regulatory function: Shutdown
Source: Developed locally

Links:

Secondary Problems (side effects, weakness or concerns) with this example:

Literature:

Sources of Supply:

See also:

{create links here to other examples that are comparable}