GDP Weekly Array Status Update

Composition of the Global Drifter Array on 21-Jul-2025:

Pacif.Gyre: 611
DBi : 217
SIO : 205
Metocean: 144
NKE : 41
Unknown: 15
TOTAL: 1233



Number of Iridium drifters: 1233

Fraction of array that is Iridium: 100.0 percent

Array size on 14 Jul 2025: 1237 drifters


Added IDs (8):

300534067415720 300234066716520 300234067278380 300534061283440 300534065067000 300534065265840 300534065478070 300534063217380


Lost IDs (12):

300534063018370 300234067907810 300234066914830 300534061590100 300534062488950 300534063900090 300534064307850 300534064395450 300534065167330 300534065173730

300534065073950 300534065077520


Net change: 8 - 12 = -4

New array size on 21 Jul 2025: 1233 drifters.


Death rate: 12.1 deaths per 1250 drifters per 7 days (633 deaths per 1250 per year).


Mean age of dead drifters: 582 days. Median: 511 days.


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

ID WMO# DepDate DepLat DepLon ShipManufacturer Type Prgm
300234066914830330158219-Jun-2020-59.0-64.9LM GOULD DBi BD2GI 21312


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

ID MANUFACTURER TYPE TRANSMISSION
300534065167330Pacific GySVP3A3
300534065077520SIOBD2VHI
300534064395450Pacific GySVP3A3
300534065173730SIOBD2GHI
300534065073950SIOBD2VHI
300534063018370Pacific GyBD2A3
300534062488950DBiBD2A3
300534064307850SIOSVPGHI
300534063900090Pacific GySVP3A3
300234067907810NKEBD2A3
300534061590100SIO SBD 9602