Methodology: 



IIP Annual Reports proved to be the best resource in establishing the origin of HP's 

 iceberg sizing conventions. This research commenced with the first Annual Report from 1914 and 

 worked forward to the present. The following annual reports contained some information 

 regarding size classification of icebergs: 



1914 - Icebergs are classified as either growlers or icebergs on the charts in the Annual Report 

 but no mention is made on the measurements used to classify them. The charts and ship's logs 

 were the only sources of iceberg information. 



1920 - Report makes no distinction on the size of the icebergs on the enclosed chart. 



1921 - The first in-depth look that expands on iceberg size. Report mentions large and small in 

 the text, but no specific delineation is cited. 



1923 - Report classifies icebergs as either growlers or icebergs on enclosed charts. The written 

 sighting reports make some distinctions between large and small icebergs. 



1925 - First written individual sighting reports and first use of different sizes (small, medium, 

 large and very large); no growlers are mentioned in the report, still no size measurements. 



1926 - Written individual report now includes growlers as well. 



1929 - First icebergs with measurements mentioned on the individual sighting reports, however 

 icebergs with measurements are just mentioned as bergs with no specific size given. 



1958 - Last report with written individual sighting reports of icebergs by size. 



1964 - A deterioration table mentions sizes and measurements (R.E. Lenezyk. page 98). 

 Reproduced below is Table IX as seen in the report: 



Sea Water 



Small berg 

 Under 50' high, 



Medium berg Large berg 

 50'-150'high, Over 150' high, 



Temperature i |ess th£m 2QQ , |Qng 2 00'-400' long Over 400' long 



Days 



Days 

 40 



Days 

 90 

 35 

 20 



Table IX. Deterioration Time in Days for Bergs (from Lenezyk) 



Although the table is focused on deterioration, it is clear that the height and length of the 

 various iceberg sizes were well established at that time. No distinction is made between tabular 

 and non-tabular icebergs. 



1965 - First use of a table that summarizes iceberg data according to size classification (small, 

 medium, large and unclassified), (page 29). 



49 



