ADDITIONAL MILITARY LAYERS - United Kingdom Hydrographic ...

Additional Military Layers
Environment, Seabed and Beach Product Specification
Attribute
Definition
Values
Bridge Classification Bridge Classification - Opening Bridge: A bridge that is
closed when set for carrying road
traffic and open when set to permit
marine traffic to pass through the
waterway it crosses. (Adapted from
McGraw -Hill Encyclopedia of
Science and Technology 7 th Edition,
1992)
- Fixed Bridge: A bridge having
permanent horizontal and vertical
alignment. (McGraw -Hill Dictionary
of Scientific and Technical Terms, 3 rd
Edition, 1984)
- Pontoon Bridge: A fixed floating
bridge supported by pontoons.
(McGraw -Hill Dictionary of
Scientific and Technical Terms, 3 rd
Edition, 1984)
- Draw Bridge: A general name for
bridges of which part or the entire
span of the bridge may be raised or
drawn aside to allow ships to pass
through. (IHO Dictionary S -32, 5 th
Edition, 546)
- Transporter Bridge: A bridge that
has towers on each side of the
waterway connected by a girder
system on which a carriage runs.
(IHO Chart Specifications, M -4,
381.2)
- Foot Bridge: A bridge structure used
only for pedestrian traffic.
(McGraw -Hill Dictionary of
Scientific and Technical Terms, 3 rd
Edition, 1984)
- Viaduct: A long bridge consisting of
a series of beams, spans or girders (of
steel, timber or concrete) supported
on towers or piers and used to carry a
road, railroad, etc. (Adapted from
McGraw -Hill Encyclopedia of
Science and Technology 7 th Edition,
1992)
- Aqueduct: A bridge supporting an
artificially elevated channel, for the
conveyance of water. (Adapted from
The New Shorter Oxford English
Dictionary, 1993)
- Swing Bridge: A movable bridge (or
span thereof) which rotates in a
horizontal plane about a vertical
pivot to allow the passage of vessels.
(Adapted from McGraw -Hill
Encyclopedia of Science and
Technology 7 th Edition, 1992)
Page 50
Version 1.0