Frequently Asked Questions

General FAQs

What is PNT?
PNT stands for Positioning, Navigation, and Timing where Positioning is the ability to determine accurate and precise locations; Navigation is the ability to maneuver with accuracy and precision; and Timing is the ability to acquire and maintain accurate and precise time.
Where can I get further information about GPS?
To aid further research, the Department of Homeland Security established the “Navigation Center of Excellence” (formerly “Navigation Information Service”) as a point of contact for GPS users. Operated and maintained by the U.S. Coast Guard, the NIS can be reached at (703) 313-5900 seven days a week, 24 hours a day and at www.navcen.uscg.gov
What is the difference between military and commercial GPS receivers?
The difference between a military GPS receiver and any commercial model is the internal cryptographic device that enables a military receiver to access the Precise Positioning Service (PPS) signal. Operating a military GPS receiver without an active key greatly reduces the performance of the device and limits the receiver’s ability to the Standard Positioning Service (SPS) only.
What is Spoofing?
Hostile parties may generate and broadcast false satellite signals in an attempt to throw off the accuracy of a GPS receiver in order to interfere with mission accomplishment. By operating your DAGR in keyed PPS mode, you are implementing the military GPS receiver feature intended to detect and ignore false (spoofing) signals. If you operate a DAGR without key, you are not operating a military receiver as designed. You are not getting the full value of enhanced position accuracy and in fact you are susceptible to spoofing the same as a plain commercial GPS receiver using the SPS signal. Keying a military GPS receiver is essential for it to perform as designed.
What is Jamming?
Intentional Jamming is an outright attempt to interfere with PNT. Low cost jammers can be set up with relative ease but they can also be located and eliminated when friendly forces are on alert for the potential and have the access to address the threat. The more powerful the jammer the more likely it is to be identified and eliminated.

DAGR FAQs

How do I turn my DAGR in for repair?

Turn-in instructions will vary depending on the version of the DAGR. Please contact usarmy.apg.cecom.mbx.lrc-dagr-support@mail.mil for turn-in instructions and to arrange replacement.

What do I do if my DAGR warranty has expired?
Many DAGRs are still covered by the extended warranty. DAGRs that are not covered by the warranty are repaired or replaced under the contract’s warranty exclusion clause, and the repairs are funded by CECOM. The only cost to the user is the shipment costs from the unit to the manufacturer.
What do I do if my PLGR needs repair?
Do not turn your PLGR in for repair. The PLGR is obsolete, and has been coded as “not suitable for operational use.” Because the PLGR is a PPS receiver, it cannot just be discarded. If you have PLGRs, the should be disposed of in accordance with the DEMIL “F” located at: https://tulsa.tacom.army.mil/
What accessories are authorized for DAGR?
Accessories available for the DAGR are in Chapter 25 of the DAGR O&M Manual. The Accessories are in Chapter 24, the Basic Issue Items (Army Only) are in Chapter 27, Additional Authorization List is Chapter 28. You can obtain a copy of the DAGR O&M Manual from the Downloads section of the website.
Which batteries are best for DAGR?
The battery type recommended for use in the DAGR is identified in Chapter 22 of the DAGR O&M Manual. Chapter 22 of the DAGR O&M Manual identifies the NSN for batteries used in the DAGR. The DAGR O&M Manual can be found on the downloads section of the website.
How many maps can I load into my DAGR?
The DAGR has 32MB of memory dedicated to maps and images. This will provide you with room to store 3 or 4 one degree grid squares of 1:50K TOPO maps. This is the type of map you will find at the DAGR maps page on the AGC website. As many as 100 individual map objects can be loaded to DAGR, subject to the 32MB limit.
How do I make my DAGR stay on for more than 5 minutes?
A DAGR that keeps “turning itself off” is probably in Auto-Off Mode. You can turn this feature on or off. When you turn it on, you can set the timer within a range of 15 seconds to 30 minutes at the end of which the receiver will turn off. The Auto-off mode saves power when operating in handheld mode. Reference Technical Manual paragraph. 7.5.2.1.1.
Can I see other DAGR positions from my DAGR?
No, DAGR is just a receiver. It is not a transmitter, so it does not emit signals of any kind and cannot “communicate” with other devices.

Assured PNT FAQs

What is Assured Positioning, Navigation, and Timing?
Assured Positioning, Navigation, and Timing (A-PNT) is secure, authenticated access to PNT information.
What are the benefits of Assured PNT?
Benefits of Assured Positioning, Navigation, and Timing include:

  • Reduces PNT requirements inefficiencies and redundancies
  • Decreases Warfighter vulnerabilities
  • Provides an affordable migration path to Military Code (M-Code)
How will Assured PNT support soldiers in the field?
A-PNT will provide Army Forces with unhindered access to trusted PNT information under conditions where space-based PNT may be limited or denied. The overarching A-PNT program consists of a set of complementary subprograms that, together, provide a cumulative effect to meet the overarching A-PNT requirement.

Question not listed here?

Send an email to USARMY APG PEO IEWS Mailbox PD PNT Support at usarmy.apg.peo-iews.mbx.pd-pnt-support@mail.mil