GDP Weekly Array Status Update

Composition of the Global Drifter Array on 29-Jun-2026:

Pacif.Gyre: 509
SIO : 195
Metocean: 171
DBi : 132
Unknown: 55
NKE : 31
TOTAL: 1093



Number of Iridium drifters: 1093

Fraction of array that is Iridium: 100.0 percent

Array size on 22 Jun 2026: 1093 drifters


Added IDs (11):

300534065820510 300234065069420 300534064293640 300534067022240 300534067023280 300534067581810 300534067581840 300534067581880 300534067581900 300534067583780

300534068117370


Lost IDs (11):

300534064359470 300534064894890 300534063014290 300534063900080 300534063902000 300534064291370 300534064308400 300534064491750 300534065067060 300534065069790

300534067589380


Net change: 11 - 11 = 0

New array size on 29 Jun 2026: 1093 drifters.


Death rate: 12.6 deaths per 1250 drifters per 7 days (656 deaths per 1250 per year).


Mean age of dead drifters: 664 days. Median: 665 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):

ID MANUFACTURER TYPE TRANSMISSION
300534067589380Pacific GyBD2A3
300534065067060Pacific GySVP3A3
300534065069790Pacific GySVP3A3
300534064894890NKEBD2GHI
300534064308400SIOSVPGHI
300534064359470MetoceanBD2GHI
300534063014290Pacific GyBD2A3
300534064491750Pacific GySVP3A3
300534064291370Pacific GyBD2A3
300534063902000Pacific GySVP3A3
300534063900080Pacific GySVP3A3