- Sighting Position. The latitude and longitude - Iceberg Description. Ice Patrol uses a simpli- 

 of the sighted position of the iceberg. tied code to describe the sighted icebergs. 



The code is tied to generalized sizes and 



- Sighting Date. The date the iceberg was shapes used by the iceberg drift model. The 

 sighted. following code is used: 



- Sighting Time. The time (in Universal Coor- 

 dinated Time) of the iceberg sighting. 



1 - Growler (less than 15 meters in length) 



3 - Small Non-Tabular (between 15 and 60 meters in length) 



4 - Small Tabular (between 15 and 60 meters in length) 



5 - Medium Non-Tabular (between 60 and 122 meters in length) 



6 - f\/ledium Tabular (between 60 and 122 meters in length) 



7 - Large Non-Tabular (greater than 122 meters in length) 



8 - Large Tabular (greater than 122 meters in length) 



9 - Radar Target 



If Ice Patrol receives a visual iceberg sighting 

 report without a size, medium is used. If Ice 

 Patrol receives avisual iceberg sighting report 

 without a description, non tabular is used. 

 Non-tabular includes all iceberg shapes (ex- 

 amples; pinnacle, dry-dock, domed) except 

 tabular. 



- Last Model Analysis Position. The last model 

 predicted position for the iceberg produced 

 using analysis winds before the iceberg was 

 removed from the active list. (An iceberg 

 report can be removed from the active model 

 list by being resighted or deleted by the opera- 

 tor.) 



- Number of Icebergs represented by sighting 

 record. In areas of heavy concentrations, 

 groups of icebergs may be reported together. 

 The numberof icebergs in each sighting report 

 is represented in this field. 



- Days on Plot. This field indicates the number 

 of days the iceberg sighting was drifted by the 

 model before being removed from the list of 

 active icebergs. 



- Date of Last Model Position. The date of the 

 position of the last model analysis position. 



The Pre-Model Season File Years Portion 

 of the Data Base 



This portion of the data base covers the 

 years 1 960 to 1 981 . The below comments for 

 each data field apply to this portion of the 

 database: 



- Iceberg Number. Although this number is 

 intended to be unique for each ice season, 

 some numbers were duplicated within the 

 same season. All of the duplicate numbers 

 which represent sightings of different icebergs 

 were retained in the data base. 



- Sighting Index. This field was left blank. 



- Resight. Prior to about the late 1970s, Ice 

 Patrol made few to no distinction between 

 resights and new iceberg sightings. 



- Sighting Source. When this portion of the 

 data base was originally placed in computer- 



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