A-PNT: Positioning Beyond GPS

Our A-PNT solutions leverage Iridium PNT, space-based signals up to 1,000 x more powerful than GNSS / GPS, making them highly resistant to jamming and spoofing.

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What Happens When GNSS Can’t Be Trusted?

Situational Awareness: Navigate with Confidence Maintain Visibility Across Your Fleet Demonstrate What Happened Deploy Without Disruption Manage Continuity and Operational Exposure

GNSS spoofing and jamming can leave crews navigating on incorrect information without knowing it. RockFLEET Assured helps bridge teams identify integrity issues early, providing access to an independent position reference.

From the Bridge

  • Know immediately when GNSS may be spoofed or jammed
  • See an independent position reference alongside existing navigation systems
  • Continue operating with confidence when positioning data is in question
  • Avoid introducing new systems and workflows on the bridge
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A GNSS disruption affecting one vessel is a navigation issue. A disruption affecting multiple vessels becomes an operational risk. RockFLEET Assured helps shore teams maintain visibility when conventional positioning systems are under pressure.

Provides Remote Oversight

  • Monitor vessel position integrity remotely
  • Identify vessels affected by GNSS disruption
  • Receive alerts before issues escalate
  • Maintain awareness through high risk operating regions

 

Check GPS Jam: Is your fleet at risk?
APNT-Tab5 Providing an Evidence Trail

When navigation integrity is questioned, organizations need more than assumptions. They need evidence. RockFLEET Assured helps create an independent record of positioning and integrity events to support investigation, compliance and reporting.

Providing an Evidence Trail

  • A trusted position of record
  • Evidence when GNSS disruption occurs
  • Support for investigations and reporting
  • Greater awareness of navigation risk exposure
Read more on insurance and verifiable data
APNT-Tab4 Integration Flexibility

Adding GNSS resilience can be expedited quickly with no vessel modifications. RockFLEET Assured is designed to fit into existing vessel environments, helping technical teams deploy assured positioning with minimal operational impact.

Integration Flexibility

  • Straightforward vessel deployment
  • Compatibility with existing systems
  • Flexible integration pilot options
  • Remote management and support
See integration options
APNT-Tab3 Reduce Operational Exposure

GNSS disruption can affect navigation, vessel tracking, operational decision making, and commercial exposure. RockFLEET Assured helps organizations improve resilience before a disruption becomes an operational incident.

Responding to Identifiable Risk

  • Protect vessel operations
  • Reduce liability exposure
  • Improve awareness of navigation risk
  • Support business continuity during disruption events
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Built on 23 Years of Trusted Tracking Experience

Ground Control has spent 23 years delivering reliable satellite tracking and messaging solutions for critical operations, including through our sister company, YB Tracking. Our Assured Positioning, Navigation and Timing (A-PNT) solutions build on that heritage for GNSS-disrupted maritime environments, backed by Ground Control’s experience as an Iridium gold tier partner since 2005.

Assured Positioning, Navigation and Timing (A-PNT) Key Features

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Assured PNT when GPS isn’t an option

Our devices use Iridium PNT signals – up to 1000 x stronger than GPS and resistant to spoofing or jamming – providing verified position, navigation, and timing even in GPS-denied environments. This ensures dependable situational awareness and timing continuity.

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Designed for real world deployment

From compact above-deck terminals to embedded integration formats, our A-PNT solutions are built for real operations and supported by Ground Control’s long experience delivering satellite tracking and messaging systems.

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Flexible integration options

Choose the right deployment model: a self-contained above-deck maritime terminal for retrofit, or an embedded A-PNT integration for platforms and systems. Manage configuration remotely, and deliver position plus integrity events to your software via APIs.

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Secure, verifiable, and ready now

Our A-PNT devices use Iridium PNT with cryptographic authentication to provide a trusted position source when GNSS is spoofed or jammed. Integrity reporting and event logs help teams spot anomalies when GPS is untrusted.

Hardware Options

Merchant Shipping Tankers and Gas Carriers Insurers and Brokers MarSec Partners Government Fleets Land Vehicles, UAVs & Autonomous Systems
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Merchant Shipping

For merchant shipping operators, RockFLEET Assured delivers Iridium PNT–based A-PNT in a compact, all-in-one above-deck dome terminal, providing an authenticated position source for trusted vessel position reporting in GNSS-challenged environments. Optional bridge chart view shows assured position alongside GNSS position / track.

Marine-grade and simple to install, RockFLEET Assured requires no below-deck electronics unless you choose the optional bridge view. Configuration is managed OTA, with commissioning via a Bluetooth LE app, plus APIs for integrating vessel location and events.
RockFLEET Assured

Products to support this sector

Tankers and Gas Carriers

For tanker and gas carrier operators, RockFLEET Assured (NMEA0183) provides an authenticated position source for vessels operating through high-risk, congested, or GNSS challenged waters. It helps bridge and shore teams maintain trusted vessel visibility when spoofing, jamming, or degraded GNSS could affect route confidence, safety decisions, or incident reporting.
The compact above-deck terminal is designed for straightforward vessel deployment, with optional bridge chartplotter view for comparing assured position with GNSS position/track. Cloudloop Tracking and API delivery support remote monitoring, integrity alerts, and auditable positional event data for fleet operations, compliance, and post-incident review.
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Products to support this sector

Insurers and Brokers

For marine insurers, brokers, and risk advisors, RockFLEET Assured provides independent position and integrity evidence when GNSS disruption creates uncertainty around vessel movement, route behavior, or incident timelines. It supports a more defensible view of what happened when conventional GPS derived position data may be incomplete, misleading, or disputed.
Deployed as a compact above-deck terminal, RockFLEET Assured can create trusted vessel position reports and GNSS integrity events without requiring a complex onboard retrofit. Data can be viewed in Cloudloop Tracking or delivered via API to support risk review, claims investigation, fleet exposure analysis, and client advisory services.
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Products to support this sector

MarSec Partners

For maritime security providers, RockFLEET Assured adds a trusted position layer to vessel monitoring and advisory services in areas affected by spoofing, jamming, piracy risk, sanctions exposure, or geopolitical disruption. It gives security teams an independent source of vessel position and integrity events when AIS, GNSS, and onboard reports need additional confidence.
The system supports remote fleet oversight through Cloudloop Tracking, with APIs available for integrating vessel location and event data into partner platforms, dashboards, or client reporting workflows. For wider MarSec operations, RockSTAR Burst can support personnel and field-team tracking alongside vessel-level assured positioning.
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Products to support this sector

Government Fleets

For government, coastguard, border, and public-sector maritime fleets, RockFLEET Assured provides an authenticated vessel position source for operations where GNSS reliability cannot be assumed. It supports trusted fleet oversight during patrol, enforcement, emergency response, and security operations in GNSS challenged or politically sensitive regions.
The marine grade above deck terminal is simple to deploy across existing vessels, with optional bridge view for onboard situational awareness and Cloudloop Tracking for shore based monitoring. API integration enables assured position and integrity event data to feed into existing operational systems, helping teams maintain continuity, accountability, and evidence during disruption.
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Products to support this sector

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Land Vehicles, UAVs & Autonomous Systems

For integrators building assured positioning into their own systems, RockBLOCK APNT provides Iridium PNT-based A-PNT in a compact module with standard interfaces, ideal for land vehicles, UAVs, autonomous systems and remote assets operating in GNSS-challenged environments.
Ruggedized and waterproof, it’s easily integrated via serial or USB-C, with Bluetooth available for local config. It also supports Cloudloop integration.
RockBLOCK APNT

Products to support this sector

Two Operational Views. One Trusted Position Source.

RockFLEET Assured gives both ship and shore teams a practical way to work when GNSS can’t be trusted.

On board, the bridge view helps crews compare GNSS with an independent position reference, spot anomalies quickly, and respond with more confidence. Ashore, Cloudloop Tracking helps operators maintain fleet visibility, monitor integrity alerts, and keep oversight when disruption affects one vessel or many.

Bridge view

  • Compare GNSS with an independent reference
  • Spot anomalies quickly
  • Support confident onboard decisions

Cloudloop Tracking

  • Monitor vessel position integrity remotely
  • Identify affected vessels earlier
  • Maintain fleet visibility through disruption

Read More About A-PNT

Stay On Track in GNSS-Denied Environments

Whether you’re in commerical shipping, deploying autonomous systems, or operating in contested areas, RockFLEET Assured and RockBLOCK APNT deliver reliable, spoof-resistant timing and location when GPS can’t.

Email hello@groundcontrol.com or complete the form to discuss integration options, request pricing, or see how A-PNT fits into your application.

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