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Contents
- 1 Introduction
- 2 Smaller Ferries lost in USA, Canada & Australasia
- 3 Free Surface Effect
- 4 Some ferry disasters in USA and Canada
- 5 Sample Losses of small US and Canadian Ferries
- 5.1 Sultana
- 5.2 General Slo***
- 5.3 Eastland
- 6 Some ferry disasters in Australia and New Zealand
- 7 Sample Losses of small Australasian Ferries
- 7.1 Tararua
- 7.2 Koombana
- 7.3 Wahine
- 8 Bibliography
- 9 Photographs
This series of articles provides a listing of all major passenger ships that have been lost in service. For comparison, there are also articles covering some the most significant losses of smaller passenger vessels and ferries. The articles also provide commentary on some of the most significant incidents.
For practical and technical reasons, the Articles are presented in the following parts: -
- Part 1. Definitions and the Development of International Passenger Ship Regulations
- Part 2. Fire
- Part 3. Collision,
- Part 4. Other Navigational Error
- Part 5. Structural Failure and Foundered
- Part 6. Hostilities - World War 1 and the Spanish Civil War
- Part 7. Hostilities - World War 2
- Part 8. Ship Safety Analysis - Passenger vessels over 10,000 GRT
- Part 9. Some smaller passenger vessel losses
- Part 10. Some losses of ferries below 10,000 GRT in European Waters
- Part 11. Some losses of ferries below 10,000 GRT in USA, Canada & Australasia
- Part 12. Some losses of ferries below 10,000 GRT in South East Asia & Africa
This article covers some of the ferries below 10,000 GRT that have been lost in US, Canadian and Australasian waters in peacetime.
Smaller Ferries lost in USA, Canada & Australasia[edit]
The earlier parts of these articles set out to provide a comprehensive record of all passenger vessels above 10,000 GRT that have been lost. Excluding the effects of hostilities, the world passenger ship fleet has suffered a total of 116 ship losses in the 125 years since the first ship over 10,000 GRT entered service. Of these 43 ships were lost to fire while in port (at a cost of 5 lives) and 73 at sea for all other reasons (7,301 lives). This vessel size was selected for the earlier articles for practical reasons. Many ferries are now over 10,000 GRT and sadly the list of larger passenger ships lost over the past 45 years includes 18 ferries (3,207 lives).
Ferries are defined in these articles as passenger carrying vessels engaged on regular, relatively short distance routes. This definition includes inland waterway craft, excursion, coastal and sea-going vessels, including ships providing passengers with sleeping accommodation for one or two nights. The ferry industry has in the past 45 years also become increasingly devoted to the carriage of motor vehicles using ro-ro technology.
The trade publisher ShipPax Information calculates that on 1 January 2013 there were 1,147 ferries over 1,000 GRT, carrying vehicles and passengers below decks, in service throughout the world. Of these 426 were over 10,000 GRT. It also calculates that this ferry fleet carried 2.183 billion passengers; 258 million cars; 842 thousand buses and 39 million trailers, on 7.5 million trips in 2013.
The sheer volume of ferry traffic has led SOLAS to devote special attention to the safety problems especially those that have arisen during the development of ro-ro ship designs. Those involving ships over 10,000 GRT have been covered in earlier articles; this article will address some of the disasters that befell smaller ferries.
It is in the nature of ferry services that the ships are required to operate in confined and crowded waters in all weathers. This has been a significant factor in many of the disasters recorded in this article.
Free Surface Effect[edit]
A ship floats because its weight and form displace water and the force of buoyancy this creates is greater than the gravitational force of its weight. A ship's stability is a function of its centre of gravity and its centre of buoyancy. Normally when a ship rolls in a seaway, its centre of gravity remains in a constant centre line position, while its centre of buoyancy moves in the direction of the roll; where it exerts an upward force on that side of the hull, which corrects the ship's roll. It has been a tragedy that ships' designers and ships' officers were slow to realise the disastrous impact that the free surface effect, of even a modest amount of water on a vehicle deck, has upon the stability of a ro-ro ship. As the ship rolls in a seaway, the water will rush across the deck in the direction of the roll, moving the centre of gravity as well as the center of bouyancy. One cubic metre of water weighs approximately one ton. What appears to be a small amount of water when the vessel is upright becomes equal to several tons of water thrown against the side of the vehicle deck, greatly increasing the intensity of the ship's roll and creating dwell. If this violent action allows more water to enter the vehicle deck, the ship will become increasingly unstable, until she adopts a permanent list, then rolls completely over. Unfortunately this can happen very quickly.
Some ferry disasters in USA and Canada[edit]
Largely for geographical reasons, North America has not had the same network of ferry services as Europe. During the nineteenth century ferries, or "steamboats", provided vital transportation links operating as coastal, lake and river vessels. Most were locally built, often with questionable engineering standards that led to many boiler explosions, before the US Government eventually introduced inspection regulations. The death figures given in the following table are in many cases estimates, in the absence of passenger lists for most nineteenth century voyages.
Sample Losses of small US and Canadian Ferries |