Loggerhead Turtles/WhaleNet

Location of Satellite Tagged Turtles


Transmitter ID's
ID Code Turtle Name
15247 Annie
15248 Isabelle
15249 Aerial

Note: The positioning data received is in decimal equivalents of a degree. To obtain degrees and minutes the decimal needs to be multiplied by 60, resulting in degrees and minutes, such as 30.50 degrees would equal 30 degrees and (.50 x 60) 30 minutes. The longitude is sometimes given eastward from 00 so it needs to be subtracted from 360 degrees.

Loggerhead Sighting Data
ID Turtle DAY TIME Latitude Longitude Long. adjusted Lat. in min. Long. in min.
15247 Annie 6/15/97 13:29:40 32.481 279.752 80.248 32 28.86 80 14.88
15247 Annie 6/15/97 23:05:15 32.482 279.633 80.367 32 28.92 80 22.02
15247 Annie 6/17/97 19:34:45 32.535 280.13 79.87 32 33.00 79 55.02
15247 Annie 6/21/97 9:06:23 33.388 280.869 79.131 33 23.28 79 07.86
15247 Annie 6/21/97 13:01:40 33.352 280.837 79.163 33 21.12 79 09.78
15248 Isabelle 6/21/97 18:49:32 31.759 279.041 80.959 31 45.54 80 57.54
15248 Isabelle 6/22/97 0:16:00 31.728 278.957 81.043 31 43.68 81 02.58
15248 Isabelle 6/22/97 18:38:27 31.645 278.954 81.046 31 38.70 81 02.76
15248 Isabelle 6/26/97 0:25:40 31.766 278.994 81.006 31 45.96 81 00.36
15248 Isabelle 6/26/97 6:31:03 31.796 278.934 81.066 31 47.76 81 03.96
15248 Isabelle 6/29/97 13:21:52 31.92 279.249 80.751 31 52.20 80 45.06
15247 Annie 7/1/97 12:39:37 32.919 280.475 79.525 32 55.14 79 31.50
15249 Aerial 7/1/97 7:18:08 31.452 278.782 81.218 31 27.12 81 13.08
15247 Annie 7/6/97 6:25:11 32.924 280.469 79.531 32 55.44 79 31.86
15247 Annie 7/8/97 07:40:56 32.797 280.251 79.75 32 47.82 79 15.06
15247 Annie 7/9/97 07:29:58 32.787 280.233 79.767 32 47.22 79 46.02

Transmitter ID Numbers
ID Code Turtle Name
15247 Annie
15248 Isabelle
15249 Aerial

Satellite Fixes

Data Format:
Date (dd.mm.yy): 22.08.96 23:06:55 Time (hr:min:sec)(in GMT), LC (fix quality)

LC just stands for Location Class. Location Classes of 0 and up are the best (derived from 4 or more messages)- a Class 0 is good to within between 1,000 and 5,000 meters. Classes 1,2,3- get consistently more accurate. The letter classes are given no estimate of error, but the A's are better than the B's etc. It appears that some of the letter class locations are pretty good (i.e. several fixes over a short period are quite similar), but then others vary wildly- especially the longitude.

> Lat1: 48.275N [latitude] Lon1: 69.232W [longitude]

NOTE:

The position data received is sometimes in decimal fractions of a whole degree, such as 30.50N degrees. To obtain the degree and minutes equivalent, multiply the decimal fraction times 60 minutes/degree, such as .50 x 60 = 30 minutes. In the case of 30.50 degrees, this equals 30 degrees and 30 minutes.


Loggerhead Turtle Position Fixes

>Number, Date, Time , Location Class
>Latitude, Longitude

"Aerial"

>15249 1997-08-21 19:24:34
> Lat1: 37.023 Lon1: 76.4
>
>15249 1997-08-23 07:38:03
> Lat1: 36.942 Lon1: 74.4
>

"Isabelle"

>15248 Date: 23.09.97 23:14 LC: B
> Lat1: 36:825N Lon1: 75.953
>
>15248 Date : 25.09.97 19:47:17 LC : B
> Lat1 : 36.752N Lon1 : 75.947W
>
>15248 Date : 27.09.97 07:59:15 LC : B
> Lat1 : 36.779N Lon1 : 76.052W
>
> 15248 Date : 02.10.97 07:04:09 LC : B
> Lat1 : 36.767N Lon1 : 75.892W
>
> 15248 Date : 14.10.97 12:33:22 LC : B
> Lat1 : 35.362N Lon1 : 75.429W
>
>15248 Date : 18.10.97 11:03:06 LC : B
> Lat1 : 35.145N Lon1 : 75.536W
>
> 15248 Date : 21.10.97 06:55:38 LC : 1
> Lat1 : 34.535N Lon1 : 76.078W
>
>15248 Date : 25.10.97 21:29:57 LC : B
> Lat1 : 33.842N Lon1 : 76.976W
>
> 15248 Date : 02.11.97 21:53:30 LC : A
> Lat1 : 33.805N Lon1 : 77.003W
>
> 15248 1997-11-04 11:31:48
> Lat1 : 33.815N Lon1 : 76.989W
>
>15248 1997-11-11 7:31:42 PM
> Lat1: 33.812N Lon1: 76.98
>
>15248 Date : 22.11.97 11:38:34 LC : B
> Lat1 : 33.846N Lon1 : 76.971W
>
> 15248 Date : 23.11.97 11:15:00 LC : 2
> Lat1 : 33.813N Lon1 : 76.988W

15248 Date : 27.11.97 11:24:56 LC : B
Lat1 : 33.782N Lon1 : 77.221W

"Annie"

> No new fixes


Many more data sets are available in the WhaleNet Data listserv at http://whale.wheelock.edu/archives/whalenet/0371.html. Sort by thread to group all similar data categories.

Map A to track the turtles, Download and place your fixes of the movements.

Map B to track the turtles, Download and place your fixes of the movements.


Loggerhead Links:
  • Gray's Reef National Marine Sanctuary, Georgia.

  • Loggerhead Bibliography

  • NMFS Loggerhead Turtle Page

  • NMFS Recovery Plan

  • Loggerhead Page, Turtle Watch Program, North Carolina

  • Turtle Page from Nova Scotia Museum of Natural History


    Initial Loggerhead Turtle Data Table

    Many more data sets are available in the WhaleNet Data listserv at http://whale.wheelock.edu/archives/whalenet/0371.html. Sort by thread to group all similar data categories.

    Satellite Tools, Resources, and Tracking Maps

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