GDP Weekly Array Status Update

Composition of the Global Drifter Array on 28-Sep-2026:

Pacif.Gyre: 576
SIO : 228
DBi : 123
Metocean: 116
Unknown: 57
NKE : 33
TOTAL: 1133



Number of Iridium drifters: 1133

Fraction of array that is Iridium: 100.0 percent

Array size on 21 Sep 2026: 1128 drifters


Added IDs (16):

300534067613690 300534067613660 300534067619720 300534067614610 300534063324720 300534068030290 300534068929840 300534068030250 300534063014290 300534063900080

300534065161580 300534065163000 300534065957190 300534065957350 300534065479210 300534065479100


Lost IDs (11):

300234067879240 300534065061050 300534062360410 300534065168540 300534067581580 300534067585260 300534067585480 300534067586790 300534065478460 300534064236160

300534064236450


Net change: 16 - 11 = 5

New array size on 28 Sep 2026: 1133 drifters.


Death rate: 12.2 deaths per 1250 drifters per 7 days (634 deaths per 1250 per year).


Mean age of dead drifters: 383 days. Median: 224 days.


Deplog information for dead drifters (underlined: aground/picked up):

ID   WMO#  DepDate   DepLat  DepLon   ShipManufacturer  Type   Prgm


Specification sheet info for dead drifters not in deployment log (underlined: aground/picked up):

not in spec sheet
ID   MANUFACTURER  TYPE   TRANSMISSION
300534067586790 Pacific Gy SVP3A3 
300534067585260 Pacific Gy SVP3A3 
300534067585480 Pacific Gy SVP3A3 
300534067581580 Pacific Gy SVP3A3 
300534065061050 Pacific Gy BD2A3 
300534064236160 SIO BD2VHI 
300534064236450 SIO BD2VHI 
300534065478460:  
300534065168540 Pacific Gy SVP3A3 
300534062360410 Pacific Gy BD2A3 
300234067879240 Pacific Gyre    SBD 9602