The beat goes on, more DOD Jamming, down to 50 AGL in our Area. This is getting to the point you need to be sure you're up to date on these prior to flying anywhere, They have recently been activated by the Army, Marines and Air Force. The GPS NOTAM list is getting very long but you really to check them if GPS is going to be your primary means of navigation. The area effected by each of these is huge

FEDERAL AVIATION ADMINISTRATION FLIGHT ADVISORY GPS INTERFERENCE TESTING

YUMA PROVING GROUND (YPG) 18-08

19 April – 05 May 2018 Yuma, AZ

GPS testing is scheduled as follows and may result in unreliable or unavailable GPS signal.

A.

Location: Centered at 325413N1135609W or the B ZA VORTAC 065- degree radial at 35NM.

B.

Dates and times:

19 – 21 APR 18 1830Z – 2230Z

25 APR 18 1830Z – 2230Z

26 – 27 APR 18 2000Z – 2230Z

28 APR 18 1830Z – 2230Z

30 APR 18 1830Z – 2230Z

01 – 05 MAY 18 2000Z – 2230Z

C.

Duration: Each event may last the entire requested period

.

D.

NOTAM INFO: NAV GPS (YPG GPS 18-08) (INCLUDING WAAS, GBAS, AND ADS-B) MAY NOT BE AVBL WI A 307NM RADIUS CENTERED AT 325413N1135609W (BZA065035)

FL400-UNL, 243NM RADIUS AT FL250 179NM RADIUS AT 10000FT 165NM RADIUS AT 4000FT AGL 119NM RADIUS AT 50FT AGL

E.

Pilots are encouraged to report anomalies only when ATC assistance is required.

The NOTAMs discussed in this advisory may change with little or no notice. Pilots are

advised to check NOTAMs frequently for possible changes prior to operations in the area.

NOTAMs will be published at least 24 hours in advance of any GPS tests.