BOOK_CONTENT
From Ship Design and Construction, Volume II
Brian Veitch Neil Bose I. Jordaan M. Haddara D. Spencer

Newfoundland The Steamship Arizona as She Appeared on Her Arrival at St. John's after Her Collision with an Iceberg, November 7, 1879. Reproduced from Frank Leslie's Illustrated Newspaper, December 13, 1879

40.1 DESCRIPTION

40.1.1 Mission

40.1.1.1 Introduction

Ships whose missions take them into ice-covered waters must be designed to operate effectively in an environment distinguished by cold temperatures, often remote location, and the presence of sea ice. Sea ice can be from a few centimeters to several meters thick, take on a variety of morphological forms, and change on daily, seasonal, and annual bases.

The transportation requirements that drive conventional shipping demands also prevail in ice-covered waters. Consequently, the ship types and missions of many ice-capable vessels correspond essentially to conventional ships. Ice-breakers and ice-management vessels are unique ship types that are designed specifically to operate in ice, usually in support of transportation services or infrastructure.

Early ice-going ships were basically similar to conventional ships with the addition of some hull strengthening. Modern commercial requirements to extend the navigation into areas and seasons with greater ice thickness and coverage have led to a commensurate extension of vessels' ice navigation capabilities. The impact on hull form, structure, propulsion, and auxiliary systems that operating in ice will have on any particular vessel is a function of its mission.

To describe the mission of ice-capable ships, the approach taken here is to describe first the environment and then typical operational...

Copyright The Society of Naval Architects and Marine Engineers 2004 under license agreement with Books24x7

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Deicing and anti-icing equipment removes and prevents the buildup of snow, ice, or frost on the frames of aircraft by chemical, thermal, pneumatic, or electromechanical means.
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Anti-icers and deicers or anti-icing and deicing chemicals are used to prevent ice formation, remove existing surface ice, and remove or prevent frost formation. They are available in liquid or granular forms.
Automatic Identification Systems (AIS)
Automatic Identification Systems (AIS) provide location information about a ship to other ships and to coastal authorities automatically. AIS are to be fitted aboard all ships of 300 gross tonnage and upwards engaged on international voyages, cargo ships of 500 gross tonnage and upwards not engaged on international voyages, and all passenger ships.

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