Portsmouth LNTM 46/26 – RATTLER Extended Trial Window: United Kingdom test and trial record
KHM Portsmouth extended the RATTLER trial/training framework through year-end. This is a lifecycle update to the authorization, not a new completed test.
Source-linked Intelligence Snapshot
UXVSEARCHER-3204Original development / event date: 16 Mar 2026
- Programme
- Portsmouth LNTM 46/26 – RATTLER Extended Trial Window
- System / platform
- RATTLER 1-7
- Supplier
- Royal Navy
- Customer / operator
- Royal Navy-associated trials
- Geography
- United Kingdom
- Domain
- USV
- Mission
- Technology Demonstration / Testbed
- Activity
- Product/Service Testing
- Milestone stage
- Validation / operational testing
- Original value
- Not disclosed · Not disclosed
- USD qualification
- Not disclosed
- Quantity / scope
- Up to 7 designations
- Production / shipment / delivery
- Not disclosed
- Contract period
- 1-Mar-26 — 31-Dec-26
- Contract duration
- Not applicable
Interpretation: technical maturity
Trial participation and travelled distance describe testing activity, not sales volumes.
Editorial responsibility: Tanish Prakash · Source review recorded 10 Oct 2026
Original references and evidence caveats
Original primary reference: https://www.royalnavy.mod.uk/khm/portsmouth/local-notices/lntm/2026/2646-uncrewed-surface-vessel-operations-trials-and-training-1-march-to-31-december-2026
Original supporting reference: Not independently located
Deep verified: LNTM 46/26 was issued Mar. 16 and extends RATTLER/KS-series remotely controlled USV operations from Mar. 1-Dec. 31. It is a distinct extended trial window from the January notice.
Reference notes are retained from the supplied source master. They do not establish independent verification of performance, deliveries, revenue or conversion.
Development and reported outcome
KHM Portsmouth extended the RATTLER trial/training framework through year-end. This is a lifecycle update to the authorization, not a new completed test.[S1]
Program, platform and stakeholders
Programme or contract: Portsmouth LNTM 46/26 – RATTLER Extended Trial Window. Platform or product: RATTLER 1-7. Recorded supplier, developer or relevant organization: Royal Navy (reported headquarters/country: United Kingdom). Recorded customer, operator or intended user: Royal Navy-associated trials (reported headquarters/country: United Kingdom).[S1]
Mission and technical scope
The following are classifications recorded in the source master, not additional claims of operational deployment: Mission/use-case classification: Technology Demonstration / Testbed. Operating mode: Remotely Operated Surface Vessel (ROSV).
Contract, value and shipment signals
Recorded quantity, delivery, demonstration or volume signal: Up to 7 designations. Recorded contractual start: 1-Mar-26. Recorded contractual end: 31-Dec-26.[S1]
Source verification and interpretation limits
UXV Searcher master source-coverage note: Deep verified: LNTM 46/26 was issued Mar. 16 and extends RATTLER/KS-series remotely controlled USV operations from Mar. 1-Dec. 31. It is a distinct extended trial window from the January notice.
Interpretation boundary: Testing, authorization and demonstrations should not be counted as confirmed purchases or fleet deliveries without a separate acceptance source.[S1]
UXV Searcher analysis — what the development changes
UXV Searcher interpretation — validation / operational testing: The United Kingdom USV record for Portsmouth LNTM 46/26 – RATTLER Extended Trial Window is best treated as a technical maturity signal. Testing, demonstration and certification-type activity can reduce integration uncertainty but is not equivalent to contracted fleet deployment.
Traceability for buyers: The dataset associates Royal Navy with Royal Navy-associated trials for RATTLER 1-7. This supports stakeholder mapping; supply-chain tier, exclusivity and signed-customer relationships need the underlying source before firm classification.
Client-use interpretation: For intelligence users tracking Technology Demonstration / Testbed, the relevant next proof points are marine mission suitability, payload integration and measurable delivery or service outcomes. Monitor test result, qualification scope, operational acceptance and subsequent paid orders.[S1]
Quantitative evidence, calculations and limits
Quantity/scope signal: Up to 7 designations. Counting rule: Trial/deployment context; not necessarily procurement or paid fleet additions. Reproducible calculations: Recorded start-to-end calendar interval: 305 days ((2026-12-31) - (2026-03-01) = 305 elapsed calendar days). Refer to the calculation cards for assumptions and limitations.
Trial participation and travelled distance describe testing activity, not sales volumes.[S1]
Calculations and assumptions
| Metric | Value | Formula | Inputs | Assumptions | Limitations | Sources |
|---|---|---|---|---|---|---|
| Recorded start-to-end calendar interval | 305 days | (2026-12-31) - (2026-03-01) = 305 elapsed calendar days | date_start: 2026-03-01 date_end: 2026-12-31 | Dates taken from the original master’s recorded start and end fields. Inclusive contract day-count, extensions and award timing not assumed. | Calendar interval alone does not verify actual performance, delivery or acceptance. | [S1] |
No win probability is assigned to this record.
Sources
Original reporting is credited to its publisher. The byline covers UXV Searcher's analysis only.
- [S1]Primary reference: royalnavy.mod.ukroyalnavy.mod.ukIncluded in the provided master and its source notes; this export did not independently re-test the live URL or corroborate the claims.
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