Point Clouds and Dual-Scope Campaigns: How Subsea 3D Data Is Cutting Vessel Days
Two announcements point in the same direction: capture measurable 3D data once, then use it for more than one job. One has a field result behind it. The other is a software launch with no published numbers yet.
The best documented result is Sangomar, offshore Senegal: DeepOcean combined a full-field baseline survey and a full 3D scan of 69 structures from one vessel, taking slightly more than half the time of two separate operations, with no extra offshore personnel[1]. That is a saving of a little under half, not more than half, and it comes from the contractor. Oceaneering’s Vision Subsea says it reduces repeat mobilizations, but has published no figures[3]. Neither result is from the Gulf.
01. Sangomar: two scopes, one campaign
Sangomar lies about 100 km south of Dakar. In April 2026 DeepOcean and Woodside reported a campaign from the construction vessel Island Ocean that covered one full-field baseline survey and one full 3D scan at the same time[1]. ROVs carried scanning equipment, and DeepOcean’s subsea imaging software used photogrammetry to build the 3D models[1].
| Measure | Reported result |
|---|---|
| Scope | 69 subsea structures, including 17 subsea trees |
| Time | “Slightly above half” of two separate operations |
| Data | Output doubled for Woodside, per DeepOcean |
| Personnel | No additional offshore personnel |
| Operator view | Woodside’s Sangomar subsea lead says offshore time fell and the data got richer |
All figures from DeepOcean’s release[1] and trade coverage[2]; no independent audit or dollar saving has been published.
Why it works is simple. Baseline survey and scanning both need an ROV flying near the same structures, so doing them apart means sailing, transiting and setting up twice. The method fits a young field best: Sangomar needed a first baseline anyway, which made a combined pass natural. Older fields with mixed scopes may save less (our assessment).
02. Vision Subsea: from video to a measurable record
On November 4, 2025, at ADIPEC, Oceaneering announced Vision Subsea, a module of the cloud-based Vision platform from its GDi business[3]. It displays engineering-grade point clouds collected during ROV work so that engineers can locate anomalies, run dimensional checks and plan interventions. It is meant to replace scattered drawings, reports and video with one measurable record[3].
Oceaneering says this supports life-extension planning and reduces repeat mobilizations[3][4]. Treat that as a design goal for now: the announcement gives no case data, measurement accuracy or client results.
03. How the two approaches differ
| Dual-scope campaign | 3D inspection record | |
|---|---|---|
| Saves time when | During the offshore campaign | Later, by avoiding a return trip |
| Main question | Can two scopes share one vessel pass? | Can engineers answer a question from existing data? |
| Evidence so far | One reported field campaign[1] | Vendor claims; no published figures[3] |
| Main risk | One scope is compromised to suit the other | Data goes stale or is not accurate enough for the decision |
Comparison is our assessment.
04. What to ask before paying for 3D data
- •What accuracy, and how was it checked? “Engineering-grade” has no single meaning in these announcements. Ask for the tolerance achieved and how it was tested against a known measurement.
- •Which decision will it support? A scan can show geometry and visible damage. It will not by itself replace wall-thickness or cathodic-protection readings.
- •What about poor visibility? Photogrammetry depends on clear images. Ask how the contractor handles turbidity, marine growth and cleaning, especially near Gulf river outflows.
- •How are vessel days counted? Ask for the planned days of a combined pass against two separate passes, including weather and transit.
- •Who owns the data, and in what format? A cloud viewer is useful only if the record can move with the asset when it is sold. Gulf assets do change hands, as our decommissioning guide shows.
Related reading: resident AUVs and vessel demand.
05. Frequently Asked Questions
What is a dual-scope subsea campaign? ↓
It is one ROV campaign that does two jobs at once. At Sangomar, DeepOcean ran a baseline subsea survey and a full 3D scan together instead of as two separate operations.
How much time did the Sangomar campaign save? ↓
DeepOcean says it took slightly above half the time of two separate operations, so the saving was a little under half. Actual vessel days and costs have not been published.
What is Oceaneering Vision Subsea? ↓
A module in the cloud-based Vision platform from GDi, an Oceaneering company, announced on November 4, 2025. It displays point clouds from ROV work so engineers can find anomalies, run dimensional checks and plan interventions.
Does Vision Subsea reduce repeat mobilizations? ↓
Oceaneering says it does, but the announcement provides no figures or case data, so the size of any saving is unknown.
Has dual-scope inspection been used in the Gulf of America? ↓
We found no published Gulf example as of November 2026. The reported campaign was at the Sangomar field offshore Senegal.
Sources
- [1]DeepOcean — DeepOcean and Woodside advance subsea efficiency through dual-scope approach (Apr 16, 2026)
- [2]Offshore Magazine — Simultaneous baseline subsea survey, 3D scanning cuts cost of Sangomar inspections (2026)
- [3]Oceaneering — Oceaneering expands Vision platform with Subsea module (Nov 4, 2025)
- [4]Offshore Magazine — ADIPEC 2025: New Oceaneering subsea technology supports life-extension planning
All sources accessed November 7, 2026. Figures are as published by each source; agency pages may be revised after publication.
Related
Independent information, not investment, legal or engineering advice. Gulf Coast Subsea is an independent directory. It is not affiliated with or endorsed by any company or agency mentioned on this page. Figures are compiled from public sources and labeled by source and date. Confirm current terms directly with BOEM, BSEE and the companies involved.