GDP Weekly Array Status Update

Composition of the Global Drifter Array on 30-Mar-2026:

Pacif.Gyre: 546
Unknown: 199
DBi : 165
Metocean: 124
SIO : 102
NKE : 32
TOTAL: 1168



Number of Iridium drifters: 1168

Fraction of array that is Iridium: 100.0 percent

Array size on 23 Mar 2026: 1169 drifters


Added IDs (11):

300534065280130 300534060719690 300534064293280 300534064497830 300534065470070 300534065471030 300534065471110 300534065472130 300534065950800 300534065950850

300534065951750


Lost IDs (12):

300534062094750 300534065285030 300234067173790 300534060526330 300534063011430 300534063014290 300534064598260 300534065072740 300534065160650 300534065168680

300534065661760 300534067589380


Net change: 11 - 12 = -1

New array size on 30 Mar 2026: 1168 drifters.


Death rate: 12.8 deaths per 1250 drifters per 7 days (669 deaths per 1250 per year).


Mean age of dead drifters: 555 days. Median: 486 days.


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

ID WMO# DepDate DepLat DepLon ShipManufacturer Type Prgm
300234067173790340163620-Feb-2021-19.4-126.0R/V ARAON Pacific GyBD2GI 21312


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

not in spec sheetnot in spec sheet
ID MANUFACTURER TYPE TRANSMISSION
300534065661760:
300534065160650Pacific GySVP3A3
300534067589380Pacific GyBD2A3
300534065168680Pacific GySVP3A3
300534064598260Pacific GyBD2A3
300534065072740SIOBD2GHI
300534065285030:
300534063014290Pacific GyBD2A3
300534063011430Pacific GyBD2A3
300534060526330Pacific GyBD2A3
300534062094750Pacific GyBD2A3