Port economics

Bibliographic data

Monograph

Identifikator:: 173564191X

URN:: urn:nbn:de:zbw-retromon-111718

Document type:: Monograph

Author:: Cunningham, Brysson http://d-nb.info/gnd/1055472266

Title:: Port economics

Place of publication:: London [usw.]

Publisher:: Pitman

Year of publication:: 1926

Scope:: IX, 134 S

Digitisation:: 2020

Collection:: Economics Books

Usage license:: Get license information via the feedback formular.

Chapter

Document type:: Monograph

Structure type:: Chapter

Title:: Chapter II. Explanation of terms used in connection with ports and harbours

Collection:: Economics Books

EXPLANATION OF TERMS USED has been entirely superseded by the term wet dock; a floating dock now signifies something very different, as will be seen below. A Dry Dock! is the converse of a Wet Dock, and in this country means a chamber, the floor and sides and one end of which are lined with watertight material, such as stone or concrete, and the other end provided with a pair of gates, caisson, or other means of closure, for the purpose of excluding the water during such time as the dock is occupied by a ship for the purpose of undergoing repairs. Such docks do not, of course, attain anything like the dimensions of wet docks, being constructed generally for the reception of a single ship, whereas wet docks and basins provide simultaneous accommodation for a great number of craft of all kinds. The dry dock is often referred to as a Graving Dock, the original word, ‘ graving” (engraving), being applied to the process of scraping, cleaning and painting, or tarring, the underside of a vessel's hull. But as much more extensive overhauls than this, and repairs of a very im- portant character, are carried out in dry docks, the latter term has come more generally into use than the other as indicating the wider range of service. A Floating Dock is, as the name implies, a dock structure able to float. It is generally constructed as a series of pontoons or chambers, which can be emptied of water so as to provide the necessary degree of flotation. Essentially, a floating dock consists of a floor or platform, with two side walls, all of steel framing and plating, upon and between which the ship is berthed. When the platform has been sunk to a sufficient depth to allow the vessel to float upon it, the pontoons are pumped out and the vessel 1 In America, the term ““ Dry Dock ” is also understood to include the Floating Dock, described in the next section. Sometimes, then but not invariably, the qualification * Floating ”” is added. For the purpose of avoiding confusion, the author thinks it would be better to adhere to the clear distinction between the two structures which is drawn here. 21]

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