GDP Weekly Array Status Update

Composition of the Global Drifter Array on 14-Jul-2025:

Pacif.Gyre: 610
DBi : 218
SIO : 210
Metocean: 144
NKE : 42
Unknown: 13
TOTAL: 1237



Number of Iridium drifters: 1237

Fraction of array that is Iridium: 100.0 percent

Array size on 7 Jul 2025: 1239 drifters


Added IDs (14):

300234067907810 300534065820730 300534065285020 300534067810540 300234066914830 300534063016470 300534064294940 300534065066070 300534065066100 300534065066970

300534065066990 300534065067020 300534065067030 300534065265750


Lost IDs (16):

300534061781280 300534062030390 300534061650600 300534061754110 300234067278380 300234067879480 300534060613530 300534062485540 300534064302540 300534064599690

300534065070520 300534065163550 300534065957160 300534065959140 300534061750100 300534065076930


Net change: 14 - 16 = -2

New array size on 14 Jul 2025: 1237 drifters.


Death rate: 16.2 deaths per 1250 drifters per 7 days (842 deaths per 1250 per year).


Mean age of dead drifters: 733 days. Median: 606 days.


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

ID WMO# DepDate DepLat DepLon ShipManufacturer Type Prgm
300534061650600140181928-Jan-2022-19.054.0OSIRIS DBi BD2GI 21421
300234067879480640262207-Jun-202144.3-9.6TANGAN IV Pacific GyBD2GI 21321
300534060613530520170814-Jul-202019.6134.6R/V ONNURI Pacific GySVP3GI 21312
300234067278380150167502-Apr-2020-13.0-22.1RONALD BROWN Pacific GySVP3GI 21312


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

ID MANUFACTURER TYPE TRANSMISSION
300534065957160Pacific GySVP3A3
300534065959140Pacific GySVP3A3
300534065163550Pacific GySVP3A3
300534065070520SIOBD2GHI
300534065076930SIOBD2VHI
300534064599690Pacific GySVP3A3
300534062030390MetoceanBD2GHI
300534061750100SIOBD2VHI
300534061754110SIOBD2GHI
300534064302540SIOSVPGHI
300534062485540DBiBD2A3
300534061781280Metocean SBD 9602N