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Product

Oceanographic data buoy umbilical & faired sonar tow cable5,000–9,000 daN Strength15 bar Hoses / 3×CoaxOceanographic & Sonar Buoy

REF 31555 & REF 26896 Oceanographic Buoy & Faired Sonar Tow CableOceanographic Buoy Std · 600 V · Oceanographic data buoy umbilical & faired sonar tow

REF 31555 (Central-Aramid 4-Hose Oceanographic Measurement Buoy Umbilical) & REF 26896 (3×50–60Ω FEP/ETFE Coax Double-Steel-Armoured Faired Towed Sonar Buoy Cable) (Oceanographic Buoy Std, 600 V, -20 °C to +70 °C).

Water-resistant

EMC screen

Anti-torsion braid

Oil-resistant

Configuration

Order designation: REF 31555 3-Part / Compact Assembly
Outer Ø ≈: 28.5 mm
Net weight ≈: 920 kg/km
Tensile rating ≈: 25.0 kN
Core / stranding: Helical cabled composite umbilical

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: 600 V
Operating temp.: −20…+70 °C
Min. bend radius: 12 × OD
Core / conductor: 4 Hoses
Outer protection: PUR / Faired SWA
Standard: Oceanographic

Typical values for this cable type, based on Oceanographic Measurement Buoy & Faired Sonar Tow Standard — confirmed in the datasheet and quotation for your order.

Application fit

Is REF 31555 & REF 26896 right for your machine?

Immersion & wet locations

Suitable

Water-blocked core matrix and hydrolysis-resistant subsea jacketing withstand continuous deepwater hydrostatic pressure.

Vertical / spreader reel

Suitable

Torque-balanced aramid or contra-helical steel armour supports vertical winch deployment without hockling.

Offshore platform & shipboard deck trays

Suitable

Marine-grade outer sheath and armour package resist LARS sheave abrasion, UV exposure and salt-spray corrosion.

Trailing & towing

Suitable

High tensile breaking strength supports underwater towing, ROV excursion and seabed plough/trencher duty.

Energy chain / drag chain

Not suitable

Subsea umbilical and tow construction is not intended for high-cycle indoor factory drag chains.

Use Drag-Chain Servo Cable

Typical machinesMarine & Offshore CableWork-Class & Observation ROV SystemsOffshore Wind & Subsea Power GridsOceanographic, Sonar & Seismic SurveyCommercial Diving & Subsea Intervention

Construction

Layer by layer

Shown: REF 31555 & REF 26896 (Oceanographic Measurement Buoy & Faired Sonar Tow Standard) featuring central aramid core (5,000 dan), 4 pvc fluid hoses (15 bar wp / 50 bar burst) and polyurethane outer sheath (ø63 ± 1 mm) (5-layer construction).

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	Central Aramid Core (5,000 daN)	High-modulus central aramid strength core (or double steel wire armor >9,000 daN on REF 26896)
2	4 PVC Fluid Hoses (15 bar WP / 50 bar Burst)	Four extruded PVC water-sampling and pneumatic hoses cabled around central core
3	Power & Telemetry Sub-Cables / 3×Coax	Four 4-core sensor sub-cables (REF 31555) or 3×0.34 mm² AgCu FEP/ETFE coaxes (REF 26896)
4	PVC Inner Sheath & Fillers	Interstitial fillers + extruded PVC inner sheath (HDPE inner sheath on REF 26896)
5	Polyurethane Outer Sheath (Ø63 ± 1 mm)	Black abrasion-resistant PUR jacket (REF 26896 fitted with hydrodynamic flexible careens)

REF 31555 & REF 26896 — Standard Subsea & Marine Execution

Built to Oceanographic Measurement Buoy & Faired Sonar Tow Standard with central aramid core (5,000 dan) and polyurethane outer sheath (ø63 ± 1 mm)

REF 31555 & REF 26896 — Custom Drum Length & Termination Kit

Available in custom continuous subsea/wellbore drum lengths or pre-terminated assemblies

REF 31555 & REF 26896 — Routine & Hydrostatic Test Certified

Supplied with EN 10204 3.1 routine dielectric, resistance & pressure/dimensional report

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on Oceanographic Measurement Buoy & Faired Sonar Tow Standard. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage / transmission duty: 600 V (Oceanographic Measurement Buoy & Faired Sonar Tow Standard)
Core / conductor construction: Central Aramid Core (5,000 daN) — High-modulus central aramid strength core (or double steel wire armor >9,000 daN on REF 26896)
Primary dielectric / buffering: 4 PVC Fluid Hoses (15 bar WP / 50 bar Burst) — Four extruded PVC water-sampling and pneumatic hoses cabled around central core

Thermal

Continuous operating temperature: −20…+70 °C (subsea, marine & submersible duty)
Short-circuit / peak thermal rating: Verified thermal stability per Oceanographic Measurement Buoy & Faired Sonar Tow Standard
Storage & transport temperature: −40…+80 °C on export wooden/steel drum

Mechanical

Outer protection / armouring: Polyurethane Outer Sheath (Ø63 ± 1 mm) — Black abrasion-resistant PUR jacket (REF 26896 fitted with hydrodynamic flexible careens)
Minimum bending radius: 12 × OD
Hydrostatic, tensile & crush duty: PVC Inner Sheath & Fillers — Interstitial fillers + extruded PVC inner sheath (HDPE inner sheath on REF 26896)

Resistance

Hydrostatic pressure & water blocking: Engineered for continuous submersion and hydrostatic integrity per Oceanographic Measurement Buoy & Faired Sonar Tow Standard
Seawater, oil & chemical resistance: Resistant to seawater hydrolysis, hydraulic oils and abrasion per Oceanographic Measurement Buoy & Faired Sonar Tow Standard
RoHS & REACH compliance: RoHS 2 (2011/65/EU + 2015/863) & REACH SVHC compliant

Reference standards

Governing standard: Oceanographic Measurement Buoy & Faired Sonar Tow Standard
Environmental & test standards: IEC 60228 / IEC 60332 / ISO 13628-5 / EN 10204
Quality management & inspection: ISO 9001:2015 & EN 10204 3.1 factory routine inspection

Identification

Model designation: REF 31555 & REF 26896
Sheath colour & metre marking: Continuous metre-marked black outer finish (PUR (Ø63mm) / Faired SWA)
Customs tariff (HS): 8544.49 / 8544.60 / 8544.70

Sizes

3 standard REF 31555 & REF 26896 subsea & marine configurations

Manufactured to Oceanographic Measurement Buoy & Faired Sonar Tow Standard for subsea, offshore, deep-well and marine applications.

Dimensions, tensile load & weights
Order designation	Configuration	Core / stranding	Outer Ø ≈ mm	Net weight ≈ kg/km	Tensile rating kN ≈	Min. bend R mm
REF 31555 & REF 26896 Construction Schedule (−20…+70 °C)
REF 31555 3-Part / Compact Assembly	Gas/Hydraulic Hose + Power + Comms/Coax	Helical cabled composite umbilical	28.5	920	25.0	285
REF 31555 4-Part / Standard Assembly	Dual Hose + 75 Ω Video Coax + Comms Pairs	Helical cabled composite umbilical	36.0	1,540	48.0	360
REF 31555 Heavy Bell / Intervention	Multi-Hose + 3×Coax + Power/Signal Quads	Aramid-reinforced subsea umbilical	54.0	3,420	90.0	540

Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
Custom core cross-sections, pair/fibre counts, armour grades and factory drum lengths available per Oceanographic Measurement Buoy & Faired Sonar Tow Standard.

Electrical, optical & thermal parameters
Configuration	Max. DC R₂₀ / Atten. Ω/km or dB/km	Rating / Impedance	Operating temp.
Gas/Hydraulic Hose + Power + Comms/Coax	4.95	600 V + 35–240 bar Fluid	−20…+70 °C
Dual Hose + 75 Ω Video Coax + Comms Pairs	3.30	600 V + 35–240 bar Fluid	−20…+70 °C
Multi-Hose + 3×Coax + Power/Signal Quads	1.91	600 V + 100–240 bar Fluid	−20…+70 °C

Every production length undergoes routine conductor DC resistance, high-voltage dielectric or OTDR continuity 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 resistance, continuity & dimensional verification (Oceanographic Measurement Buoy & Faired Sonar Tow Standard)	DC resistance at 20 °C / optical attenuation and outer diameter within Oceanographic Measurement Buoy & Faired Sonar Tow Standard tolerances	Every manufactured drum length
High-voltage dielectric & insulation resistance test (Oceanographic Measurement Buoy & Faired Sonar Tow Standard)	Zero dielectric breakdown and verified insulation resistance for 600 V rating	Every manufactured drum length
Sample tests
Hydrostatic pressure, water-blocking & mechanical endurance qualification (Oceanographic Measurement Buoy & Faired Sonar Tow Standard)	Verified submersion integrity, tensile load and thermal stability 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

Oceanographic Buoy Std 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 REF 31555 & REF 26896 Oceanographic Buoy Std 600 V CE

Delivery form: Heavy-duty export fumigated wooden drums or steel subsea reels
Standard lengths: 500 m, 1,000 m or custom continuous subsea/wellbore lengths
MOQ: 100 m (standard configurations) · 500 m (custom builds)
Lead time: 2–5 weeks ex-works
Incoterms: EXW, FCA, FOB, CIF, DAP

Technical documents

Downloads

PDFREF 31555 & REF 26896 Oceanographic Buoy & Faired Sonar Tow Cable – technical datasheet3 sizes · construction, technical data, approvals XLSXREF 31555 & REF 26896 spec data (Excel)All 3 sizes with dimensions and data, for your BOM or quotation

Revision: 2026-10-25
Updated: 2026-10-25

FAQ

Questions engineers ask first

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

What governing standard and construction define REF 31555 & REF 26896 (REF 31555 & REF 26896 Oceanographic Buoy & Faired Sonar Tow Cable)?

REF 31555 & REF 26896 (REF 31555 & REF 26896 Oceanographic Buoy & Faired Sonar Tow Cable) is manufactured in accordance with Oceanographic Measurement Buoy & Faired Sonar Tow Standard for 600 V service over -20 °C to +70 °C. Its 5-layer construction comprises central aramid core (5,000 dan), 4 pvc fluid hoses (15 bar wp / 50 bar burst) and polyurethane outer sheath (ø63 ± 1 mm).

What is the minimum bending radius and operating temperature range for REF 31555 & REF 26896?

The minimum bending radius for REF 31555 & REF 26896 is 12 × OD across its continuous operating temperature range of -20 °C to +70 °C, ensuring mechanical and dielectric reliability in subsea, marine and submersible service.

How are the concentric layers of REF 31555 & REF 26896 arranged from inside to outside?

From inside to outside, the construction sequence is: (01) Central Aramid Core (5,000 daN) — High-modulus central aramid strength core (or double steel wire armor >9,000 daN on REF 26896); (02) 4 PVC Fluid Hoses (15 bar WP / 50 bar Burst) — Four extruded PVC water-sampling and pneumatic hoses cabled around central core; (03) Power & Telemetry Sub-Cables / 3×Coax — Four 4-core sensor sub-cables (REF 31555) or 3×0.34 mm² AgCu FEP/ETFE coaxes (REF 26896); (04) PVC Inner Sheath & Fillers — Interstitial fillers + extruded PVC inner sheath (HDPE inner sheath on REF 26896); (05) Polyurethane Outer Sheath (Ø63 ± 1 mm) — Black abrasion-resistant PUR jacket (REF 26896 fitted with hydrodynamic flexible careens).

What factory test certificates are supplied with REF 31555 & REF 26896?

Every production drum of REF 31555 & REF 26896 undergoes routine conductor resistance/continuity, high-voltage dielectric and dimensional testing per Oceanographic Measurement Buoy & Faired Sonar Tow Standard, and is delivered with an EN 10204 3.1 factory test certificate.

Request a quote

Get an engineering quote for REF 31555 & REF 26896

Your selection and application details are copied into the enquiry form below.

01Selected sizes

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02Reel & motion

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03Message for our engineers

REF 31555 & REF 26896 Oceanographic Buoy & Faired Sonar Tow Cable

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Reel & motion:
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