Glacial Calving 100 Years Ago.

19 – the number of icebergs that third class survivor Charles Dahl later claimed he had seen from lifeboat number 15, during the hours following the sinking. In an interview with the Chicago American newspaper Dahl criticised the speed at which Titanic had been travelling through the icefield, describing how Carpathia had needed to zigzag through bergs whilst collecting survivors.

50 – 100 feet – the estimated height of the iceberg above water, as recounted by Titanic survivors.

200 – 400 feet – the estimated length of the iceberg.

1 mile – the likely original length of the Titanic iceberg. The year it would have taken to move along the 40 mile long fjord would have left the iceberg at around a half of its original size.

40,000 – the approximate number of icebergs born each year along the coast of Greenland

300 – the approximate number of icebergs reaching the shipping lanes of the North Atlantic in April 1912, the largest number for around 50 years. The appearance of icebergs this far south can be highly erratic; for example

in 2006 the International Ice Patrol (the monitoring team set up after the Titanic disaster)

recorded no icebergs crossing south of latitude 48°N;

in 2007 they recorded 324.