Muirfield Seamount

Muirfield Seamount
Summit depth	16–18 m (52–59 ft)
Height	~5,000 m (16,404 ft)
Location
Location	Indian Ocean
Coordinates	13°13′30″S 96°7′30″E / 13.225°S 96.125°E / -13.225; 96.125Coordinates: 13°13′30″S 96°7′30″E / 13.225°S 96.125°E / -13.225; 96.125
Country	Australia (EEZ)
History
Discovery date	1973

The Muirfield Seamount is a submarine mountain located in the Indian Ocean approximately 130 kilometres (70 nautical miles) southwest of the Cocos (Keeling) Islands. The Cocos Islands are an Australian territory, and therefore the Muirfield Seamount is within in Australia's Exclusive Economic Zone (EEZ). The Muirfield Seamount is a submerged archipelago, approximately 2.5 kilometres (1.6 miles) in diameter and 16–18 metres (52–59 feet) below the surface of the sea. A 1999 biological survey of the seamount performed by the Australian Commonwealth Scientific and Industrial Research Organisation (CSIRO) revealed that the area is depauperate.

The Muirfield Seamount was discovered accidentally in 1973 when the cargo ship MV Muirfield (a merchant vessel named after Muirfield, Scotland) was motoring in waters charted at a depth of greater than 5,000 metres (16,404 ft), when she suddenly struck an unknown object, resulting in extensive damage to her keel.^[1] In 1983, HMAS Moresby, a Royal Australian Navy survey ship, surveyed the area where Muirfield was damaged, and charted in detail this previously unsuspected hazard to navigation.

The dramatic accidental discovery of the Muirfield Seamount is often cited as an example of limitations in the vertical datum accuracy of some offshore areas as represented on nautical charts, especially on small-scale charts. A similar incident involving a passenger ship occurred in 1992 when the Cunard liner RMS Queen Elizabeth 2 struck a submerged rock off Block Island in the Atlantic Ocean.^[2] More recently, in 2005 the submarine USS San Francisco (SSN-711) ran into an uncharted seamount about 560 kilometers (350 statute miles) south of Guam at a speed of 35 knots (40.3 mph; 64.8 km/h), sustaining serious damage and killing one seaman.

See also

• Jasper Seamount
• Graveyard Seamounts
• Mud volcano
• Sedlo Seamount
• South Chamorro Seamount

References

1. ^ Calder, Nigel. How to Read a Navigational Chart: A Complete Guide to the Symbols, Abbreviations, and Data Displayed on Nautical Charts. International Marine/Ragged Mountain Press, 2002.
2. ^ British Admiralty. The Mariner's Handbook. 1999 edition, page 23.

External links

• [1], a summary of the 1999 CSIRO Franklin voyage that included a survey of the Muirfield Seamount.