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Method-specific report workpapers · U.S. inspection teams

Map Borescope Images to Component Locations

A useful internal inspection image needs a physical location relationship. Record the access route, orientation and feature references that allow another reviewer to understand where the image came from without guessing from its filename.

NDT Connect Editorial · Published · Editorial policy

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Give each image a physical reference as well as a filename

A borescope picture can show a clear feature while leaving the recipient unable to locate it inside the component. Begin with the inspected item, access point and physical reference used during the examination. Connect those details to the actual image identifier. A sequence number generated by the camera establishes file order, not location. The report should preserve enough context to distinguish similar-looking internal surfaces and to support later review without relying on the original examiner’s memory.

The location map is a reporting aid, not a navigation procedure or an authorization to open equipment. Use the actual access arrangements and technical instructions applicable to the work. If the examiner could not establish a precise location, preserve that uncertainty rather than inventing a coordinate from the image appearance. A bounded description tied to a known feature is more useful than a precise-looking location that has no supporting relationship to the physical component.

Identify the access port and component configuration

Record the actual access opening and the component configuration during examination. A common port name may be ambiguous if several similar openings exist. Use the drawing, equipment tag or established project reference that distinguishes it. Preserve relevant assembly state where it changes the internal view. A component examined before installation or after removal of another part may present a different route from the same nominal opening, so the event context should remain clear.

Do not infer the route from the final image alone. The camera may have passed through an intermediate space or changed direction before reaching the recorded feature. Keep the source navigation notes or other actual evidence where required. The report can summarize the relationship without reproducing every movement, but it should identify the path sufficiently to explain which internal region the image represents. An access-port label is the starting point of that relationship, not complete proof of the image location.

Define the orientation convention explicitly

If the report uses clock positions, left and right or a top reference, define the viewing direction and physical datum. The displayed top of an image may change when the probe rotates or the software rotates the view. Do not assume that the screen orientation is a fixed component orientation. Preserve the convention used by the examiner and any reviewed transformation applied during reporting. This prevents the same feature from receiving contradictory locations in different images of the same event.

Evident’s large reciprocating-engine application note identifies probe orientation and similar filenames across cylinders as practical inspection-record challenges. The note uses an engine example; it does not define the correct datum for every component. For this worksheet, the useful principle is to connect each image to the actual physical reference and component identity established during the examination, rather than inferring orientation from the camera’s display alone.

Use recognizable features without overstating certainty

A known internal feature can help relate an image to the component, but record the basis for identifying it. Repeated geometry can make several locations look similar. Do not use an uncertain visual resemblance as a definitive coordinate. Preserve the actual examiner’s description and any supporting drawing or sequence reference. If the location is bounded between identified features, state that relationship accurately rather than replacing it with an unsupported exact distance or component index.

Keep feature identity separate from the interpretation of an observed condition. A mark can help orient a view without establishing that it is a defect, a manufacturing feature or a previous repair. The responsible technical review supplies that classification. The location map should describe how the view is related to the component and which evidence supports that relationship. It should not turn a convenient landmark label into a new technical conclusion about the feature itself.

Do not treat insertion length as an automatic internal coordinate

If the field record includes insertion length, preserve what was measured and the reference point used. A flexible probe can follow a curved path, and the amount inserted does not automatically equal straight-line distance to the viewed feature. Use the actual technical interpretation of that value. Do not convert a cable marking into a precise axial coordinate merely because the report table has a distance column. The source needs to establish the relationship that makes the value meaningful.

Where insertion length is only a navigation aid, label it accordingly and retain the physical feature references used for location. If the path changed between views, identify the relevant event context. The worksheet does not calculate probe position or reconstruct a three-dimensional route. It helps preserve the evidence the examiner actually recorded, including the limits of that evidence. This allows later reviewers to use the information without assuming a positional accuracy that the examination did not establish.

Connect still images with video segments carefully

A still image extracted from video should identify the actual source file and frame or time reference used by the project. Keep the time reference distinct from the examination date and from a component position. A video timestamp identifies a place in the recording, not necessarily a unique physical feature. Preserve the navigation or observation record that connects the selected moment to the component. This is particularly important when the probe revisits the same region during one recording.

If the video has been edited, identify whether the reported reference points to the original recording or the edited version. A time offset can change when sections are removed or combined. Do not give a timestamp that resolves to a different view in the delivered file. Retain the original relationship through the actual package index, and check the recipient’s copy. A clear clip can be useful for communication while still requiring a traceable source reference for technical review.

Separate location evidence from dimensional measurement

An image that locates an observation does not necessarily support a dimensional measurement. If the report includes a size, identify the actual measurement mode, source record and reviewed basis. Do not infer physical dimensions from screen pixels or use an unverified nearby feature as a scale. Preserve units and any qualification supplied by the technical process. The location worksheet can link to a measurement record, but it does not validate the instrument’s measurement or create a new result from an ordinary picture.

Waygate’s remote visual inspection guide distinguishes several borescope measurement technologies and discusses tagged image records. This is manufacturer context, not proof that every borescope view supports the same measurement capability. Record what the actual system and examination produced. Avoid treating an instrument’s advertised measurement feature as evidence that a specific reported value was obtained through that feature under the required conditions.

Worked example: the camera rotation changes the apparent clock position

In a fictional vessel inspection, images I21 and I24 show the same internal attachment from different probe orientations. The examiner’s notes relate both to physical reference F3, but the report preparer labels the first at the top and the second at the right side based only on the screen display. That creates the appearance of two separate locations. The reviewer returns to the actual orientation and feature records, preserves the common F3 relationship and explains that the images are different views of the same area.

If the available evidence did not establish that correlation, the report would retain the uncertainty rather than merge the observations. This hypothetical example supplies no positional tolerance or inspection technique. Its purpose is to show that camera orientation, physical orientation and feature identity are separate pieces of information. The location map connects them through actual evidence so a later reader does not count one observation twice or search for it on the wrong side of the component.

Fictional borescope image-location decisions
RecordMeaningEvidence relationshipIncorrect inference
I21 and I24Two selected viewsActual orientation and F3 correlationDifferent screen positions prove different physical locations
Access port P2Starting point for the routeComponent drawing and event configurationPort identity alone fixes every image location
Video time referencePosition in a particular recordingOriginal or edited file and navigation recordTimestamp is a physical distance
Reported dimensionSeparate reviewed measurementActual mode and measurement recordA clear picture automatically supplies a valid scale

Preserve observation identity across repeated views

When several images depict one reviewed observation, use a stable observation identifier and list the associated views. Do not create a new indication number for every picture unless the technical review establishes separate observations. Conversely, do not combine similar-looking features from different locations without supporting correlation. The report should preserve the responsible decision about identity and make the evidence relationship visible, particularly where repeated internal geometry makes visual matching difficult.

A concise image group can include a context view, a closer view and a separate measurement record where applicable. Explain the purpose of each instead of presenting them as interchangeable evidence. The context image may locate the region while the closer view supports the observation description. The measurement record has its own basis. Keeping those roles distinct helps the recipient understand the result without assuming that every image establishes location, characterization and size equally well.

Keep image quality and access limitations attached to the view

If the examiner records a limitation caused by contamination, reflection, focus, obstruction or another condition, connect it to the affected view and region. Do not apply one vague image-quality note to the entire package when only specific records are affected. Equally, do not omit a material limitation because a selected image appears clear at report size. The responsible technical assessment determines what the evidence supports, and the report should preserve that assessment alongside the observation.

Distinguish a region that was reached from a region that was adequately assessed for the stated task. A probe may pass near a feature without obtaining the required view. Record the actual examination boundary and any follow-up instruction. The worksheet does not approve an alternate route or tell users to enter inaccessible equipment. It describes the completed event and its limits so the client can understand whether a missing result concerns access, image evidence, interpretation or another unresolved question.

Use image names that survive package reorganization

Retain the original image identity and provide a clear delivery cross-reference if files are renamed. Avoid using a filename as the only place where component, location and event meaning are stored. A recipient may reorganize the folder or copy an image into another report. The accompanying index should preserve the relationship independently. If the same short camera filename occurs in several folders, use the actual package path or another stable reference that uniquely identifies the intended source.

Do not erase the relationship between source images and later annotated or resized versions. Label the derivative’s purpose and retain its source reference. A version prepared for a presentation may omit metadata or surrounding context needed for a technical review. The report should describe the actual delivered form and where the source can be retrieved. It should not promise that an ordinary image copy contains a complete navigation history or all of the instrument’s original measurement information.

Make historical comparisons location-specific

Before comparing a current image with an earlier inspection, establish that they refer to the same physical feature and component condition. Similar filenames or visual appearance are insufficient on their own. Preserve the earlier event, access route and orientation relationship where available. If the location cannot be correlated confidently through the responsible review, describe the current observation without asserting a trend. A qualified comparison is more useful than a confident statement of change based on unmatched views.

Keep changes in lighting, angle, preparation and measurement method visible where they affect the comparison. A feature can appear larger or more prominent in a different view without establishing physical growth. The technical process determines what conclusions the evidence supports. The location worksheet helps organize that evidence but does not calculate growth or remaining life. Its role is to prevent a later report from treating two convenient pictures as a valid historical comparison without a supported physical relationship.

Use the free workspace for the location index and narrative

The digital reporting tool can hold the image-position index, reviewed observations and explanatory notes, including supported DOCX or XLSX table imports. It does not analyze borescope video, calculate internal position or attach examination images through its logo controls. Keep still images, video and measurement files in the agreed external package. Use text references that accurately identify those records rather than stating that the generated PDF contains material that is only delivered separately.

The equipment tracker can organize scope and optical-tip references, while the procedure draft workspace can help structure proposed reporting responsibilities for review. Neither establishes the actual image location or validates a measurement. The borescope measurement buyer guide addresses capability questions when selecting equipment; this worksheet records the evidence produced by a particular examination, which remains a separate practical task.

Preserve optical-tip changes that affect the view relationship

If the examination record identifies a change of optical tip or viewing arrangement, keep the affected image boundary clear. A later image may present the same physical feature from a different direction or field of view. Do not infer a changed component condition solely from that difference in presentation. Reference the actual equipment configuration and responsible interpretation where relevant, particularly when a measurement record uses a specific configuration. The report does not need an invented sequence of every adjustment; it needs the documented relationship that explains why the selected views differ and which evidence supports the reported observation.

Test whether another reviewer can find the intended view

Begin with one report observation and follow its image reference into the delivered package. Confirm the component, access point, orientation and physical feature relationship. Then start with a selected image and find the observation or explanation it supports. This exposes orphan pictures, duplicate names and incorrect video offsets. A colleague who did not perform the examination can often identify missing context quickly, while the original examiner may unconsciously supply it from memory.

Use the report buyer-review guide for wider package checks and replace the worksheet’s fictional example with actual reviewed records. The completed index should make images useful beyond the day of inspection: the recipient can understand where a view came from, what it supports and which limits remain. It preserves the distinction between visual evidence, physical location and measurement without claiming that the reporting software provides automatic navigation, technical interpretation or approval.

Borescope image and physical-location cross-reference

Download this editable CSV for the task described above. Replace illustrative prompts with your own supported facts. The worksheet is a planning aid; it does not establish inspection acceptance or approval.

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Questions about this workflow

Does the top of a borescope image identify the top of the component?

Not automatically. Preserve the actual physical datum and viewing direction, including probe or display rotation where relevant.

Can insertion length be used as the exact internal position?

Only with an established technical relationship. A flexible probe path and its inserted length do not automatically define a straight-line component coordinate.

Should every image receive a separate indication number?

Not necessarily. Several views may support one observation. Preserve the responsible correlation and distinguish separate physical observations where established.

Can the reporting tool calculate dimensions or locations from borescope video?

No. It organizes supplied text and supported Office tables. Keep video, image-location analysis and measurement evidence in the appropriate external technical workflow.

Sources and editorial scope

Primary references support the specific context cited in the guide. Worked examples and suggested workflows are NDT Connect editorial guidance. Confirm the documents and authority applicable to the actual assignment.

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Free tools for this workflow

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Equipment tracker

Maintain an account equipment register and supporting records. An entry does not establish equipment fitness for a particular examination.