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continental shelf of a coastal state as comprising the seabed and
subsoil of the submarine areas that extend beyond its territorial sea
throughout the natural prolongation of its land territory to the outer
edge of the continental margin, or to a distance of 200 nautical miles
from the baselines from which the breadth of the territorial sea is
measured where the outer edge of the continental margin does not extend
up to that distance; the continental margin comprises the submerged
prolongation of the landmass of the coastal state, and consists of the
seabed and subsoil of the shelf, the slope and the rise; wherever the
continental margin extends beyond 200 nautical miles from the baseline,
coastal states may extend their claim to a distance not to exceed 350
nautical miles from the baseline or 100 nautical miles from the 2500
meter isobath; it does not include the deep ocean floor with its
oceanic ridges or the subsoil thereof
exclusive fishing zone - while this term is not used in the
UNCLOS, some states (e.g. the United Kingdom) have chosen not to claim
an EEZ, but rather to claim jurisdiction over the living resources off
their coast; in such cases, the term exclusive fishing zone is often
used; the breadth of this zone is normally the same as the EEZ or 200
nautical miles

Median age
This entry is the age that divides a population into two numerically
equal groups; that is, half the people are younger than this age and
half are older. It is a single index that summarizes the age
distribution of a population. Currently, the median age ranges from a
low of about 15 in Uganda and Gaza Strip to 40 or more in several
European countries and Japan. See the entry for "Age structure" for the
importance of a young versus an older age structure and, by
implication, a low versus a higher median age.

Merchant marine
Merchant marine may be defined as all ships engaged in the carriage of
goods; or all commercial vessels (as opposed to all nonmilitary ships),
which excludes tugs, fishing vessels, offshore oil rigs, etc. This
entry contains information in four fields - total, ships by type,
foreign-owned, and registered in other countries.
Total includes the number of ships (1,000 GRT or over), total
DWT for those ships, and total GRT for those ships. DWT or dead weight
tonnage is the total weight of cargo, plus bunkers, stores, etc., that
a ship can carry when immersed to the appropriate load line. GRT