Plain-English explanation
PNT (Positioning, Navigation, and Timing) stands for Positioning, Navigation, and Timing. GPS is the primary source of PNT for nearly all modern military and civilian systems — artillery targeting, drone navigation, precision-guided munitions, network timing. Resilient PNT is the ability to maintain accurate positioning, navigation, and timing even when GPS is jammed, spoofed, or denied. It is also called anti-jam, GPS-denied navigation, or alternative PNT.
Solutions include inertial navigation (accurate but drifts over time), visual and terrain-relative navigation, magnetic-anomaly navigation, and signals of opportunity (cellular, broadcast, or low-Earth-orbit satellite signals). No single alternative fully replaces GPS; the emerging consensus is a cascading architecture combining multiple methods with documented failover logic.
02 · Why it matters in UkraineWhy it matters in Ukraine
Russian EW (Electronic Warfare) units have jammed and spoofed GPS continuously across the theater since 2022, degrading the performance of GPS-guided munitions. When GPS is jammed, drones that rely on it lose pre-programmed flight paths. Fiber-optic drones were invented in part to solve this problem.
03 · Why it matters to U.S. and allied warfightersWhy it matters to U.S. and allied warfighters
The Defense Science Board concluded that the U.S. will likely face similar challenges in any major conflict, and has called for bold action on GPS hardening and alternative navigation. Every system that depends on GPS is a vulnerability in a peer fight.
04 · Why it matters to industry and manufacturingWhy it matters to industry and manufacturing
Resilient PNT lives in trusted sensors, antennas, and processing that must be small, low-power, and supportable. Helicon evaluates anti-jam and alternative-navigation technologies that keep systems usable in GPS-denied environments.
05 · Common misunderstandingsCommon misunderstandings
- “Military GPS can’t be jammed.” Military M-code GPS is more resistant but not immune.
- “Inertial navigation is a complete backup for GPS.” It drifts over time and needs periodic updates; it is a bridge, not a permanent replacement.
- “Anti-jam GPS is enough.” It raises the threshold but does not eliminate the risk; full resilient PNT requires layered approaches.
Related technologies and concepts
Resilient PNT is inseparable from EW and from drone autonomy. See those explainers.
07 · Further reading and videosFurther reading and videos
The Defense Science Board PNT summary, the Belfer Center alt-PNT architecture paper, and the CSIS lessons report are the core sources. No verified official-channel video was confirmed; we link out.
08 · How Helicon works in this areaHow Helicon works in this area
Helicon evaluates resilient-PNT, anti-jam, and electronic-maneuver technologies and works to make them trusted, compliant, and supportable in allied production.
Cited sources
Every factual claim above traces to these sources, confirmed live as of the research date. Independently verify before operational use.
- Defense Science Board — Position, Navigation, and Timing Control, Executive Summary (2024)Open original
- Belfer Center — Navigating Without GPS: A Cascading Alt-PNT Architecture for American Defense (June 2026)Open original
- CSIS — Lessons from the Ukraine Conflict (Feb. 2025)Open original