1 / 5

Product

subsea umbilical, ROV tether & oceanographic tow cable RT0127 Buoyant EO Tether1.0 kV – 3.0 kV (-30 to +80 °C)Yellow Polyurethane (PUR) Outer Jack

RT0127 1.0–3.0 kV (Ø 24.5 mm) Aramid-Reinforced Neutrally Buoyant Electro-Optical ROV TetherRT0127 Buoyant EO Tether — 1.0 kV – 3.0 kV — -30 to +80 °C Subsea & Offshore Cable

RT0127 1.0–3.0 kV (Ø 24.5 mm) Aramid-Reinforced Neutrally Buoyant Electro-Optical ROV Tether (RT0127 Buoyant EO Tether) engineered for 1.0 kV – 3.0 kV service across -30 to +80 °C (min. bend radius 8 × OD).

Water-resistant

EMC screen

Oil-resistant

Approved

Configuration

Order designation: RT0127 ROV Tether Config A
Outer Ø ≈: 32.0 mm
Net weight ≈: 1,850 kg/km
Tensile rating ≈: 85.0 kN
Core / stranding: Compacted / Class 5 Cu/SnCu + FO

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: 1.0 kV – 3.0 kV
Operating temp.: −30…+80 °C
Min. bend radius: 8 × OD
Core / conductor: 2-Fiber Single-M
Outer protection: Yellow Polyureth
Standard: RT0127 Buoyant E

Typical values for this cable type, based on RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification — confirmed in the datasheet and quotation for your order.

Application fit

Is RT0127 ROV Tether right for your machine?

Immersion & wet locations

Suitable

Hydrolysis-resistant polyurethane (PUR) or HDPE jacket and water-blocked core withstand continuous deepwater hydrostatic immersion.

Vertical / spreader reel

Suitable

Torque-balanced contra-helical steel wire armour or high-modulus aramid strength member supports dynamic winch deployment without hockling

Trailing & towing

Suitable

Abrasion-resistant outer sheath and high working-load strength elements handle dynamic marine towing, buoy mooring and ROV excursion.

Offshore platform & shipboard deck trays

Suitable

UV-stabilised, oil- and seawater-resistant construction withstands A-frame sheaves, traction winches and open research-vessel decks.

Energy chain / drag chain

Not suitable

Subsea umbilical, ROV tether and towed array cables are not designed for indoor factory automation drag chains.

Use M23 Servo Assembly

Typical machinesUnderwater & Ocean ExplorationOceanographic CTD, ADCP & Deep-Tow SurveysWork-Class & Observation ROV / AUV SystemsSide-Scan Sonar, SAS & Towed Hydrophone ArraysMarine 2D/3D/UHR Seismic Streamers & OBC

Construction

Layer by layer

Shown: RT0127 ROV Tether (RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification) featuring 2-fiber single-mode fist optical tube, power (2×2.0 mm²) & signal (2×0.5 mm²) cores and yellow polyurethane (pur) outer jacket (4-layer construction).

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	2-Fiber Single-Mode FIST Optical Tube	Central laser-welded stainless-steel tube with 2 single-mode fibers
2	Power (2×2.0 mm²) & Signal (2×0.5 mm²) C	Four copper conductors with polyolefin insulation
3	Composite Foamed Buoyancy & Aramid Braid	Syntactic foam buoyancy layer + braided aramid strength member
4	Yellow Polyurethane (PUR) Outer Jacket	High-visibility PUR sheath (Ø 24.5 mm, 20 kg/km weight in seawater)

RT0127 ROV Tether — Standard Subsea & Offshore Execution

Built to RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification with 2-fiber single-mode fist optical tube and yellow polyurethane (pur) outer jacket

RT0127 ROV Tether — Custom Continuous Winch / Reel Length

Available in custom continuous subsea winch, tow or seabed lengths with water-blocked terminations

RT0127 ROV Tether — Hydrostatic, Tensile & Routine Certified

Supplied with EN 10204 3.1 routine dielectric, optical OTDR / DC resistance & tensile test report

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage / transmission duty: 1.0 kV – 3.0 kV (RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification)
Core / conductor construction: 2-Fiber Single-Mode FIST Optical Tube — Central laser-welded stainless-steel tube with 2 single-mode fibers
Primary dielectric / buffering: Power (2×2.0 mm²) & Signal (2×0.5 mm²) Cores — Four copper conductors with polyolefin insulation

Thermal

Continuous operating temperature: −30…+80 °C (subsea & offshore duty)
Hydrostatic & thermal stability: Verified thermal and hydrostatic stability per RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification
Storage & transport temperature: −40…+80 °C on export wooden/steel winch reel

Mechanical

Outer protection / armouring: Yellow Polyurethane (PUR) Outer Jacket — High-visibility PUR sheath (Ø 24.5 mm, 20 kg/km weight in seawater)
Minimum bending radius: 8 × OD
Armour, strength member & mechanical duty: Composite Foamed Buoyancy & Aramid Braid — Syntactic foam buoyancy layer + braided aramid strength member

Resistance

Seawater, hydrostatic & hydrolysis resistance: Engineered for continuous seawater immersion, pressure cycling and hydrolysis resistance per RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification
Oil, drilling mud & abrasion resistance: Resistant to marine hydraulic oils, salt mist, winch sheave wear and seabed abrasion per RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification
RoHS & REACH compliance: RoHS 2 (2011/65/EU + 2015/863) & REACH SVHC compliant

Reference standards

Governing standard: RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification
Environmental & test standards: IEC 60228 / IEC 60794 / ITU-T G.972 / IEEE 1580 / EN 10204
Quality management & inspection: ISO 9001:2015 & EN 10204 3.1 factory routine inspection

Identification

Model designation: RT0127 ROV Tether
Sheath colour & metre marking: Continuous metre-marked black outer finish (Yellow Polyureth)
Customs tariff (HS): 8544.49 / 8544.60 / 8544.70

Sizes

3 standard RT0127 ROV Tether subsea & offshore configurations

Manufactured to RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification for subsea, oceanographic, ROV, seismic and offshore applications.

Dimensions, tensile load & weights
Order designation	Configuration	Core / stranding	Outer Ø ≈ mm	Net weight ≈ kg/km	Breaking / tensile kN ≈	Min. bend R mm
RT0127 ROV Tether Construction Schedule (−30…+80 °C)
RT0127 ROV Tether Config A	3×25–50 mm² (or 3P+FO Composite)	Compacted / Class 5 Cu/SnCu + FO	32.0	1,850	85.0	380
RT0127 ROV Tether Config B	3×95–150 mm² (or Heavy EOM)	Compacted / Class 5 Cu/SnCu + FO	48.5	4,280	130.0	580
RT0127 ROV Tether Config C	3×240–400 mm² (or Trunk HV/MV)	Compacted Cu + Lead/Armour + FO	78.0	9,650	210.0	950

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 breaking loads and continuous winch/seabed lengths available per RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification.

Electrical, optical & thermal parameters
Configuration	Max. DC R₂₀ / Atten. Ω/km or dB/km	Rating / Impedance	Operating temp.
3×25–50 mm² (or 3P+FO Composite)	0.50	1.0 kV – 3.0 kV (Subsea/MV)	−30…+80 °C
3×95–150 mm² (or Heavy EOM)	0.19	1.0 kV – 3.0 kV (Subsea/MV)	−30…+80 °C
3×240–400 mm² (or Trunk HV/MV)	0.08	1.0 kV – 3.0 kV (Trunk/HV)	−30…+80 °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, optical OTDR continuity & dimensional verification (RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification)	DC resistance at 20 °C / optical attenuation and outer diameter within RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification tolerances	Every manufactured drum length
High-voltage dielectric & insulation resistance test (RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification)	Zero dielectric breakdown and verified insulation resistance for 1.0 kV – 3.0 kV rating	Every manufactured drum length
Sample tests
Hydrostatic pressure, tensile breaking load & water-blocking qualification (RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification)	Verified subsea pressure integrity, torque-balanced tensile performance and thermal stability across −30…+80 °C	Type qualification & periodic lot audit

Inspection certificate

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

Product approvals

RT0127 Buoyant EO Tether 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 RT0127 ROV Tether RT0127 Buoyant EO Tether 1.0 kV – 3.0 kV CE

Delivery form: Heavy-duty export fumigated wooden drums, steel oceanographic winch reels or submarine turntables
Standard lengths: 500 m, 1,000 m, 3,000 m, 6,000 m or custom continuous subsea lengths
MOQ: 100 m (standard configurations) · 500 m (custom subsea builds)
Lead time: 2–6 weeks ex-works
Incoterms: EXW, FCA, FOB, CIF, DAP

Technical documents

Downloads

PDFRT0127 1.0–3.0 kV (Ø 24.5 mm) Aramid-Reinforced Neutrally Buoyant Elec – technical datasheet3 sizes · construction, technical data, approvals XLSXRT0127 ROV Tether spec data (Excel)All 3 sizes with dimensions and data, for your BOM or quotation

Revision: 2026-10-26
Updated: 2026-10-26

FAQ

Questions engineers ask first

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

What governing standard and construction define RT0127 ROV Tether (RT0127 1.0–3.0 kV (Ø 24.5 mm) Aramid-Reinforced Neutrally Buoyant Electro-Optical ROV Tether)?

RT0127 ROV Tether (RT0127 1.0–3.0 kV (Ø 24.5 mm) Aramid-Reinforced Neutrally Buoyant Electro-Optical ROV Tether) is manufactured in accordance with RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification for 1.0 kV – 3.0 kV service over -30 to +80 °C. Its 4-layer construction comprises 2-fiber single-mode fist optical tube, power (2×2.0 mm²) & signal (2×0.5 mm²) cores and yellow polyurethane (pur) outer jacket.

What is the minimum bending radius and operating temperature range for RT0127 ROV Tether?

The minimum bending radius for RT0127 ROV Tether is 8 × OD across its continuous operating temperature range of -30 to +80 °C, ensuring mechanical, hydrostatic and dielectric reliability in subsea and offshore service.

How are the concentric layers of RT0127 ROV Tether arranged from inside to outside?

From inside to outside, the construction sequence is: (01) 2-Fiber Single-Mode FIST Optical Tube — Central laser-welded stainless-steel tube with 2 single-mode fibers; (02) Power (2×2.0 mm²) & Signal (2×0.5 mm²) Cores — Four copper conductors with polyolefin insulation; (03) Composite Foamed Buoyancy & Aramid Braid — Syntactic foam buoyancy layer + braided aramid strength member; (04) Yellow Polyurethane (PUR) Outer Jacket — High-visibility PUR sheath (Ø 24.5 mm, 20 kg/km weight in seawater).

What factory test certificates are supplied with RT0127 ROV Tether?

Every production drum of RT0127 ROV Tether undergoes routine conductor resistance/OTDR continuity, high-voltage dielectric and dimensional testing per RT0127 (Ø 24.5 mm) 1.0–3.0 kV FIST Optical + Aramid Neutrally Buoyant ROV Tether Specification, and is delivered with an EN 10204 3.1 factory test certificate.

Request a quote

Get an engineering quote for RT0127 ROV Tether

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

01Selected sizes

Use + Add next to a size or configuration.

02Reel & motion

Add your operating conditions here to include them in your enquiry.

Reel typeDrum core diameter (mm)Cable length on drum (m)Travel speed (m/min)Max. accelerationCycles per hourLength and quantityAmbient temperatureExposure (outdoor, water, oil, abrasion)Destination countryEquipment and operating conditions

03Message for our engineers

RT0127 1.0–3.0 kV (Ø 24.5 mm) Aramid-Reinforced Neutrally Buoyant Electro-Optical ROV Tether

Selected sizes:


Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
- Cable length on drum (m): 
- Travel speed (m/min): 
- Max. acceleration: 
- Cycles per hour: 
- Length and quantity: 
- Ambient temperature: 
- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
- Equipment and operating conditions:

Send via WhatsApp