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Product

subsea ROV umbilical, AUV tether & sonar tow cable ITU-T G.972 / CIGRE TB 4901.8/3 kV (-20 to +70 °C)Subsea / Marine Outer Protective She

M-PAC Seafloor Observatory & BMS Umbilical CableITU-T G.972 / CIGRE TB 490 — 1.8/3 kV — -20 to +70 °C Subsea & Marine Cable

M-PAC Seafloor Observatory & BMS Umbilical Cable featuring single-mode / multi-mode optical unit and subsea / marine outer protective sheath (ITU-T G.972 / CIGRE TB 490, 1.8/3 kV, -20 to +70 °C, min. bend radius 15 × OD).

Water-resistant

Ozone, UV & moisture

Outdoor & humid

Approved

Configuration

Order designation: M-PAC Seafloor Observatory 3×6 + 4×SM + 2TP
Outer Ø ≈: 20.8 mm
Net weight ≈: 1,280 kg/km
Max. pulling ≈: 115.0 kN
Core / stranding: SnCu + Gel Tube + Contra-Helical GSWA

All sizes (3)

Request a quote Datasheet WhatsApp info@tebaoflex.com

Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum

Rated voltage: 1.8/3 kV
Operating temp.: −20…+70 °C
Min. bend radius: 15 × OD
Core / conductor: Single-Mode / Mu
Outer protection: Subsea / Marine
Standard: ITU-T G.972 / CI

Typical values for this cable type, based on ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard — confirmed in the datasheet and quotation for your order.

Application fit

Is M-PAC Seafloor Observatory right for your machine?

Immersion & wet locations

Suitable

Hydrolysis-resistant subsea PUR or HDPE outer sheath and water-blocked core interstices withstand continuous deep-ocean hydrostatic immers

Vertical / spreader reel

Suitable

Contra-helical galvanized steel wire armour or high-modulus aramid/LCP braid supports vertical traction winches, TMS cages and tow sheaves

Free-hanging vertical run

Suitable

Torque-balanced armour or neutrally buoyant foamed-PUR jacket prevents hockling and kinking during free-swimming ROV and tether excursions

Offshore platform & shipboard deck trays

Suitable

Resists seawater, marine bio-fouling, hydraulic oil, UV radiation and abrasion across vessel A-frames and launch-and-recovery systems (LAR

Energy chain / drag chain

Not suitable

Subsea ROV umbilicals and tow cables are optimized for winch deployment and water-column catenaries rather than high-speed factory drag ch

Use Drag-Chain Feeder Cable

Typical machinesUnderwater & Ocean ExplorationWork-Class & Observation ROV Umbilicals and TMS TethersOffshore Aquaculture Net Cleaners & Subsea Cage InspectionAUV, Ocean Glider & Expendable Spool-Payoff Micro-TethersUSV Towed Sonar Arrays, Seabed Crawlers & Subsea Trenchers

Construction

Layer by layer

Shown: M-PAC Seafloor Observatory (ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard) featuring single-mode / multi-mode optical unit, power & control copper conductors and subsea / marine outer protective sheath (4-layer construction).

M-PAC Seafloor Observatory — stepped horizontal cutaway showing Single-Mode / Multi-Mode Optical Unit and Subsea / Mar — Layer cutaway

#	Layer	Material & reference
1	Single-Mode / Multi-Mode Optical Unit	Hermetic stainless-steel tube / tight-buffered optical unit
2	Power & Control Copper Conductors	Stranded copper conductors with Cross-linked polyethylene (XLPE) insulation
3	Galvanized Steel Wire Armour	High-strength galvanized steel wire armour layer
4	Subsea / Marine Outer Protective Sheath	Black hydrolysis- & abrasion-resistant marine Polyurethane (PUR) outer sheath

M-PAC Seafloor Observatory — Standard Subsea & Marine Execution

Built to ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard with single-mode / multi-mode optical unit and subsea / marine outer protective sheath

M-PAC Seafloor Observatory — Custom Winch Length / Molded Termination

Available on continuous export winch drums or factory-terminated with subsea wet-mate / mechanical sockets

M-PAC Seafloor Observatory — Hydrostatic & Routine Certified

Supplied with EN 10204 3.1 routine dielectric, conductor/optical continuity & hydrostatic qualification report

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage / operating system: 1.8/3 kV (ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard)
Core / conductor construction: Single-Mode / Multi-Mode Optical Unit — Hermetic stainless-steel tube / tight-buffered optical unit
Primary dielectric / optical buffer: Power & Control Copper Conductors — Stranded copper conductors with Cross-linked polyethylene (XLPE) insulation

Thermal

Continuous operating temperature: −20…+70 °C (submerged seawater & topside deck service)
Hydrostatic & thermal cycling endurance: Verified cold-bend and wet dielectric stability across −20…+70 °C per ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard
Storage & transport temperature: −40…+80 °C on export wooden/steel cable drum

Mechanical

Outer jacket / sheath protection: Subsea / Marine Outer Protective Sheath — Black hydrolysis- & abrasion-resistant marine Polyurethane (PUR) outer sheath
Minimum bending radius: 15 × OD
Reinforcement / screen / bedding layer: Galvanized Steel Wire Armour — High-strength galvanized steel wire armour layer

Resistance

Seawater, hydrolysis & oil resistance: Resistant to permanent seawater immersion, hydrolysis, hydraulic oil and bio-fouling per ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard
Hydrostatic pressure & water blocking: Radial and longitudinal water-blocking integrity verified per ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard
RoHS & REACH compliance: RoHS 2 (2011/65/EU + 2015/863) & REACH SVHC compliant

Reference standards

Governing standard: ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard
Subsea & conductor qualification standards: IEC 60228 / DNV-ST-E402 / ISO 13628-5 / IEC 60794 / EN 10204
Quality management & inspection: ISO 9001:2015 & EN 10204 3.1 factory routine inspection

Identification

Model designation: M-PAC Seafloor Observatory
Sheath colour & metre marking: Continuous metre-marked black outer finish (Subsea / Marine )
Customs tariff (HS): 8544.49 / 8544.60 / 8544.70

Sizes

3 standard M-PAC Seafloor Observatory configurations

Manufactured to ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard for subsea robotics, ROV umbilicals, marine aquaculture and offshore sensor applications.

Dimensions, tensile load & weights
Order designation	Configuration	Core / stranding	Outer Ø ≈ mm	Net weight ≈ kg/km	Max. pulling kN ≈	Min. bend R mm
M-PAC Seafloor Observatory Construction Schedule (−20…+70 °C)
M-PAC Seafloor Observatory 3×6 + 4×SM + 2TP	3×6 mm² Power + 4×SM Fiber + 2×2×0.75	SnCu + Gel Tube + Contra-Helical GSWA	20.8	1,280	115.0	250
M-PAC Seafloor Observatory 3×10 + 6×SM + 4TP	3×10 mm² Power + 6×SM Fiber + 4×2×0.75	SnCu + SS Tube + Double Steel Armour	25.4	1,890	185.0	305
M-PAC Seafloor Observatory 3×16 + 8×SM/MM	3×16 mm² Power + 8×SM/MM + 3×2×1.0	SnCu + SS Tube + Heavy GSWA Pack	30.2	2,680	260.0	365

Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
Custom core counts, optical fiber channels, wet-mate terminations and continuous winch lengths available per ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard.

Electrical, optical & thermal parameters
Configuration	Max. DC R₂₀ Ω/km	Rating / Impedance / Load	Operating temp.
3×6 mm² Power + 4×SM Fiber + 2×2×0.75	3.30	1.8/3 kV · 115 kN MBS	−20…+70 °C
3×10 mm² Power + 6×SM Fiber + 4×2×0.75	1.91	1.8/3 kV · 185 kN MBS	−20…+70 °C
3×16 mm² Power + 8×SM/MM + 3×2×1.0	1.21	1.8/3 kV · 260 kN MBS	−20…+70 °C

Every production length undergoes routine conductor DC resistance / OTDR optical attenuation, AC dielectric and dimensional verification.

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

ConductorClass 5 stranding
Spark test100 % in-line
Lay-upCores, earth, fillers
SheathingInner, braid / screen, outer
Electrical testsAC voltage, resistance
DimensionsOD, wall thickness
Inspection documents & dispatchDrum & dispatch

Testing & inspection	Test value / reference	Frequency
Routine tests
Conductor DC resistance / OTDR optical & dimensional check (ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard)	DC resistance at 20 °C, optical attenuation and wall thickness within ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard limits	Every manufactured drum length
AC high-voltage dielectric & insulation resistance test (ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard)	Zero dielectric breakdown and verified wet insulation resistance for 1.8/3 kV rating	Every manufactured drum length
Sample tests
Hydrostatic pressure, tensile load & seawater immersion qualification (ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard)	Verified hydrostatic pressure integrity, breaking load and flex endurance across −20…+70 °C	Type qualification & periodic lot audit

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

ITU-T G.972 / CIGRE TB 490 CompliantEN 10204 3.1 Factory Test CertificateCE, RoHS 2 (2011/65/EU) & REACH

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX M-PAC Seafloor Observatory ITU-T G.972 / CIGRE TB 490 1.8/3 kV CE

Delivery form: Heavy-duty export fumigated wooden drums, steel winch reels or pre-terminated subsea assemblies
Standard lengths: 500 m, 1,000 m, 3,000 m continuous winch lengths or custom cut-to-length subsea jumpers
MOQ: 100 m (standard configurations) · 300 m (custom subsea builds)
Lead time: 2–4 weeks ex-works
Incoterms: EXW, FCA, FOB, CIF, DAP

Technical documents

Downloads

PDFM-PAC Seafloor Observatory & BMS Umbilical Cable – technical datasheet3 sizes · construction, technical data, approvals XLSXM-PAC Seafloor Observatory spec data (Excel)All 3 sizes with dimensions and data, for your BOM or quotation

Revision: 2026-10-29
Updated: 2026-10-29

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

What governing standard and construction define M-PAC Seafloor Observatory (M-PAC Seafloor Observatory & BMS Umbilical Cable)?

M-PAC Seafloor Observatory (M-PAC Seafloor Observatory & BMS Umbilical Cable) is manufactured in accordance with ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard for 1.8/3 kV subsea,ROV and marine aquaculture service over -20 to +70 °C. Its 4-layer construction comprises single-mode / multi-mode optical unit, power & control copper conductors and subsea / marine outer protective sheath.

What is the minimum bending radius and operating temperature range for M-PAC Seafloor Observatory?

The minimum bending radius for M-PAC Seafloor Observatory is 15 × OD across its continuous operating temperature range of -20 to +70 °C, ensuring mechanical flex endurance and hydrostatic reliability in subsea winches, TMS cages and aquaculture installations.

How are the concentric layers of M-PAC Seafloor Observatory arranged from inside to outside?

From inside to outside, the construction sequence is: (01) Single-Mode / Multi-Mode Optical Unit — Hermetic stainless-steel tube / tight-buffered optical unit; (02) Power & Control Copper Conductors — Stranded copper conductors with Cross-linked polyethylene (XLPE) insulation; (03) Galvanized Steel Wire Armour — High-strength galvanized steel wire armour layer; (04) Subsea / Marine Outer Protective Sheath — Black hydrolysis- & abrasion-resistant marine Polyurethane (PUR) outer sheath.

What factory test certificates are supplied with M-PAC Seafloor Observatory?

Every production drum of M-PAC Seafloor Observatory undergoes routine conductor DC resistance / optical OTDR continuity, AC high-voltage dielectric and dimensional testing per ITU-T G.972 & CIGRE TB 490 M-PAC Seafloor Observatory Umbilical Standard, and is delivered with an EN 10204 3.1 factory test certificate.

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01Selected sizes

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03Message for our engineers

M-PAC Seafloor Observatory & BMS Umbilical Cable

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