{{short description, Percentage of empy volume in a ship Permeability of a space in a

ship A ship is a large watercraft that travels the world's oceans and other sufficiently deep waterways, carrying cargo or passengers, or in support of specialized missions, such as defense, research, and fishing. Ships are generally distinguished ...

is the percentage of empty volume in that space. Permeability is used in ship survivability and damaged stability calculations in ship design. In this case, the permeability of a space is a percentage from 0 to 100. Alternately, the permeability may be a

coefficient In mathematics, a coefficient is a multiplicative factor in some term of a polynomial, a series, or an expression; it is usually a number, but may be any expression (including variables such as , and ). When the coefficients are themselves var ...

from 0 to 1. The permeability of a space is the percentage of volume of the space which may be occupied by seawater if the space is flooded. The remaining volume ot filled with seawaterbeing occupied by machinery, cargo, accommodation spaces, etc.

Example

Typical values from the International Bulk Chemical Code are: * 0.95 for voids (empty spaces), tanks, and living spaces * 0.85 for machinery spaces * 0.60 for spaces allocated to stores. This implies that for damaged stability calculation purposes, machinery spaces are only 15% full with machinery by volume (100% - 85% = 15%).

References

* Title 46 U.S. Code of Federal Regulations
Nautical terminology