MRT INSPECTION REPORT
PV-26_RE20375.002
Client logo
Project Information
Client:
Havila Subsea
Vessel:
Havila Subsea Vessel
Project No:
20375
Inspection Date:
27.02.2026
Project Title:
MRT Havila Subsea
Location:
Bergen
Purchase Order:
PO-12345
Inspector:
JSF
Wire Information
Wire Application:
Main Crane Wire
Construction:
35x7 Rotation Resistant
Certificate No:
123456
Date Installed:
2023
Nominal Diameter:
76 mm
Manufacturer:
Bridon
Installed Length:
850 m
Last Inspection:
2025
Revision History
| Client Rev | PV Rev | Date | Description | Prepared | Checked | Approved |
|---|---|---|---|---|---|---|
| A | 01 | 27.02.2026 | Issued for use | JSF | ACH | ESL |
Status Code
| 1 | Accepted |
| 2 | Accepted with comments incorporated; revise and resubmit |
| 3 | Not accepted; revise and resubmit |
| 4 | Issued for information only |
| 5 | Interface information accepted and frozen |
Table of Contents
| 1. | Abbreviations and References |
| 2. | Introduction |
| 3. | Inspection Summary |
| 4. | Inspection Details |
| 5. | MRT Results |
| 6. | Rope Visual Inspection |
| 7. | MRT Data Recorder Diagrams |
| 8. | Photo Documentation |
| 9. | Discard Criteria (Reference) |
| 10. | Conclusion / Recommendation |
1. Abbreviations and References
Abbreviations
| MRT | Magnetic Rope Testing |
| LMA | Loss of Metallic Area |
| LF | Local Fault |
Project Specific Documents
| /1/ | PV-26_RE20375.002 | MRT Report Wire (This Document) |
Rules and Regulations
| ASTM E1571-01 | Standard Practice for Electromagnetic Examination of Ferromagnetic Steel Wire Rope (MRT testing) | |
| NS-ISO 4309:2017 | Cranes – Steel wire ropes – Care, maintenance, inspection and discard criteria |
2. Introduction
Port Vantage AS has on behalf of Havila Shipping performed a thorough wire inspection
using Magnetic Rope Testing (MRT) on the Arcelor Mittal NOTOR 76 mm main crane wire
installed on the vessel Havila Subsea.
The MRT inspection was carried out in Nedstrandsfjorden.
The inspection was performed in two stages during both spooling out and spooling in. Diameter measurements were checked at several positions and the wire rope was carefully inspected over the section from 0 – 680 m for signs of wear or damage.
The wire rope was lubricated using Masto WRL during the same operation.
The MRT inspection was carried out in Nedstrandsfjorden.
The inspection was performed in two stages during both spooling out and spooling in. Diameter measurements were checked at several positions and the wire rope was carefully inspected over the section from 0 – 680 m for signs of wear or damage.
The wire rope was lubricated using Masto WRL during the same operation.
3. Inspection Summary
Overall Condition:
Acceptable
Recommended Action:
Continue in service
Discard Criteria:
Not exceeded
Broken Wires Detected:
No
Local Damage:
None
Visual Inspection:
Performed
Comments
Wire condition within acceptable limits according to ISO 4309. No reject criteria were exceeded during the MRT and visual inspection.
4. Inspection Details
Inspection Details
Crane Reference:
—
Length Inspected:
850 m
Inspection Direction:
Upwards
Inspection Speed:
0.5 m/s
Start Reference:
Socket / End Termination
Finish Reference:
850 m from socket
Operational Status:
In service
Lubrication Condition:
Good
Instrument Details
Instrument Used:
MRT instrument
Sensors:
LMA and LF
Data Recorder:
9622
Magnetic Head:
MH 70 no. 18922
Calibration Date:
26.02.2026
Calibration Status:
Valid
Additional Rope / Job Data
Rope Grade:
1960 N/mm²
ABL:
736 kN
5. MRT Results
5.1 Summary
The Magnetic Rope Testing (MRT) inspection was carried out over the inspected
wire rope section during both spooling out and spooling in operations.
The inspection identified 2 reportable signal indications within the inspected
length. Maximum LMA value remained below discard criteria, and the recorded LF
indication did not exceed reject criteria according to ISO 4309.
A local fault indication was recorded at 245 m from socket and a corrosion / metallic area loss indication was recorded at 672 m from socket. Neither indication exceeded reject criteria, but both should be monitored at the next scheduled inspection interval.
5.2 Finding 1
Position:
245 m
Reference:
From socket
Type:
Broken wire indication
Severity:
Minor
Comment / Action:
Monitor during next inspection interval
| LF-MRT Data | Value |
|---|---|
| Over a length of 6d | 1.89 |
| Over a length of 30d | 1.89 |
| Severity rating | 19% |
| LMA-MRT Data | Value |
|---|---|
| Over a length of 30d – worst case | 0.74 |
| Severity rating | 0% |
Combined Severity Rating: 20%
5.3 Severity / Criteria Data
Maximum LMA Value:
0.74% (Discard criteria is 10% LMA over a length of 30D)
Maximum LF Value:
20% (Discard criteria is 6% within 6 times the rope nominal diameter or more than 10% within 30 times the rope diameter)
| LF-MRT Data from Inspection | Loss of metallic area % |
|---|---|
| Over a length of 6d | 1.89 |
| Over a length of 30d | 1.89 |
| Severity rating | 19% |
| LMA-MRT Data from Inspection and Severity Rating for Inspected Length | Loss of metallic area % |
|---|---|
| Over a length of 30d – worst case | 0.74 |
| Severity rating | 0% |
LF- and LMA-MRT Combined Severity Rating: 20%
6. Rope Visual Inspection
| Position (m) | Broken Wires | Measured Diameter (mm) | Diameter Change | Corrosion | Damage / Deformation | Severity Rating | Comments |
|---|---|---|---|---|---|---|---|
| 1 | 0 | 29.1 | +0.4 mm | None | None | 0 | Within acceptable limits |
| 50 | 0 | 28.6 | +0.1 mm | None | None | 0 | No visible defects |
| 100 | 0 | 28.7 | 0 mm | None | None | 0 | No visible defects |
| 150 | 0 | 28.8 | +0.1 mm | None | None | 0 | No visible defects |
| 200 | 0 | 28.8 | +0.1 mm | None | None | 0 | No visible defects |
| 250 | 0 | 28.7 | 0 mm | None | None | 0 | No visible defects |
| 300 | 0 | 28.6 | 0.1 mm | None | None | 0 | No visible defects |
| 350 | 0 | 28.8 | +0.1 mm | None | None | 0 | No visible defects |
| 400 | 0 | 28.7 | 0 mm | None | None | 0 | No visible defects |
7. MRT Data Recorder Diagrams
Figure 1 – Inspection Trace
Inspection trace from MRT data recorder showing LF (local fault) and LMA signals along the inspected wire length.
Numbered peaks indicate possible broken wire signals detected during inspection.
Figure 2 – LMA Calibration Trace
Calibration trace recorded prior to inspection to verify instrument sensitivity and calibration parameters for
Loss of Metallic Area (LMA) measurement.
8. Photo Documentation
Photo 1 – Wire section during inspection
Photo 2 – Drum spooling condition
Photo 3 – Sheave condition
Photo 4 – Termination point
9. Discard Criteria (Reference)
LF-MRT Maximum Permissible Loss of Metallic Area
| Inspection Length | Maximum Loss of Metallic Area |
|---|---|
| Over a length of 6d | 6 % |
| Over a length of 30d | 10 % |
LMA-MRT Maximum Permissible Loss of Metallic Area
| Inspection Length | Maximum Loss of Metallic Area |
|---|---|
| Over a length of 30d | 10 % |
Visual Corrosion Severity Guidance
| Condition | Severity Rating |
|---|---|
| Surface oxidation that can be wiped clean | Superficial – 0 % |
| Wire surface rough to touch | Intermediate severity |
| Heavily pitted wires or slack outer strands | Discard – 100 % |
| Visible internal corrosion debris between strands | Discard – 100 % |
10. Conclusion / Recommendation
Assessment
The inspected wire rope remains within acceptable operational limits in accordance
with ISO 4309 discard criteria. No critical anomalies or reject conditions were
detected during the MRT inspection or visual assessment.
Continued operation of the wire rope is recommended. The rope should remain under normal inspection intervals and be reassessed during the next scheduled inspection or earlier if operational conditions change.
Inspector Signature / Date