M25M Silver is the 20–32 kHz general-purpose Gen4X modem. Subnero specifies up to 15 kbps in shallow tropical conditions or more than 4 km in littoral waters; the page does not establish both simultaneously. Nominal 0.1 m ranging precision is stated without an independent positioning-accuracy assessment. Hardware depth options and receive-channel count are purchase configuration choices.
Technical detail
Core features
Vendor-specified 12 kHz bandwidth with PSK-OFDM and FH-BFSK modulation.
Specified Doppler resilience of ±4 knots or better; link performance remains channel dependent.
Ethernet 10/100 Mbps, RS232, JSON/TCP and Java, Groovy, Python, C, JavaScript and Julia software interfaces.
Table lists 18–30 VDC supply, <4 W receive, <45 W average transmit, <200 mW sleep and <5 mW deep sleep.
Listed depth configurations are 300, 2,000, 4,000 or 6,000 m; one or two receive channels are configurable at purchase.
Acoustic modem
MF band
Software-defined
Use & integration
Recorded applications
Subsea instrument and sensor networks
Vehicle telemetry and control
These describe the reviewed application scope, not confirmed deployments, released requirements or procurement eligibility.
Evidence of maturity
Commercial product family. Nauticus separately reports 2,300 m vertical operation with a Subnero configuration, without identifying it as this exact current SKU.
Commercial availability
Current Silver Gen4X standalone/open configurations are quoted; verify the selected housing, transducer and software package.
Integration and verification
Readiness
A technology readiness level is not established by the reviewed public sources.
Reviewed connections
No reviewed Mission area or released Defence need connection is currently published.
Original sources 2 linked records
These records support this capability and its published Mission area and Defence need connections. A source count is not a count of independent confirmations.
Ethernet 10/100 Mbps, RS232, JSON/TCP and Java, Groovy, Python, C, JavaScript and Julia software interfaces.
Supports: Capability · core features
Listed depth configurations are 300, 2,000, 4,000 or 6,000 m; one or two receive channels are configurable at purchase.
Supports: Capability · commercial availability
Current Silver Gen4X standalone/open configurations are quoted; verify the selected housing, transducer and software package.
Supports: Capability · core features
Vendor-specified 12 kHz bandwidth with PSK-OFDM and FH-BFSK modulation.
Supports: Capability · core features
Table lists 18–30 VDC supply, <4 W receive, <45 W average transmit, <200 mW sleep and <5 mW deep sleep.
Supports: Capability · technical tags
M25M Silver acoustic smart modem supports the documented software-defined function or classification.
Supports: Capability · technicaldomainslugs
M25M Silver acoustic smart modem supports the documented autonomous-systems function or classification.
Supports: Capability · name
M25M Silver acoustic smart modem
Supports: Capability · summary
M25M Silver is the20–32kHz general-purpose Gen4X modem. Subnero specifies up to15kbps in shallow tropical conditions or more than4km in littoral waters, rather than proving both simultaneously. Nominal0.1m ranging precision is stated without an independent positioning accuracy assessment. Hardware depth options and receive-channel count are purchase configuration choices.
Supports: Capability · technical tags
M25M Silver acoustic smart modem supports the documented acoustic modem function or classification.
Supports: Capability · technicaldomainslugs
M25M Silver acoustic smart modem supports the documented communications-and-cyber function or classification.
Supports: Capability · technical tags
M25M Silver acoustic smart modem supports the documented MF band function or classification.
Supports: Capability · defence applications
M25M Silver acoustic smart modem supports the documented Vehicle telemetry and control function or classification.
Supports: Capability · maturity
Commercial product family. Nauticus separately reports2300m vertical operation with a Subnero configuration, without identifying it as this exact current SKU.
Supports: Capability · defence applications
Subsea instrument and sensor networks
Supports: Capability · capability type
Product and networking software
Supports: Capability · core features
Specified Doppler resilience of ±4 knots or better; link performance remains channel dependent.
