Marine Casualty Damage Survey Singapore — Drone Documentation of Collision & Contact Damage | SG Drone

Q: What can a drone document after a collision or contact?

Everything above the waterline, at close range and from angles no one can otherwise reach. That means the impact zone itself with set-in, tearing and fracture of shell plating; the extent of deformation running fore and aft of the contact; damage to bulwarks, railings, hull fittings and side shell openings; superstructure, accommodation block and bridge wing damage; deck, hatch and cargo area condition; anchor, hawse and mooring arrangement damage; and any evidence of paint transfer or scoring that helps establish contact geometry. Thermal imaging is added where fire or overheating is part of the incident.

Q: Why use a drone rather than a boat and a surveyor with a camera?

Because of angle, coverage and speed. A launch sits at sea level, so it photographs a high-sided hull from below at an acute angle, and it cannot see over the bulwark, onto the deck, or into the top of a damaged superstructure at all. A drone works at any height along the side, looks down into the damage rather than up at it, and covers the full length of the hull in one continuous, overlapping capture. It is also far quicker to deploy, which matters when a vessel is on a schedule or when the condition needs recording before any repair or salvage work disturbs it.

Q: Can the survey cover damage below the waterline?

Not from the air. Aerial capture stops at the waterline, and in a casualty the submerged damage is frequently the more consequential part. The standard arrangement is a paired survey: the drone documents everything above water while an ROV or diver examines the submerged shell, and the two records are compiled together. Where the vessel is going to dry dock or where a formal in-water survey is required, the underwater element follows that route instead, with the aerial record providing the above-water half of the picture.

Q: Is drone imagery acceptable as evidence for insurers and investigations?

Imagery is routinely relied on by owners, insurers, P&I correspondents and surveyors provided it is captured and handled properly. What makes it useful is not the drone but the discipline around it: timestamped and geolocated capture, an unbroken record of the original files, coverage that shows context as well as close detail, and a clear account of when the survey was flown relative to the incident and to any subsequent work. We deliver original unedited imagery alongside the report for exactly that reason. Whether any particular material is admissible in a given proceeding is a matter for the parties and their advisers.

Q: How quickly can you mobilise after an incident?

Speed is limited by permissions rather than by equipment. A flight in Singapore requires an activity permit, and a vessel at anchorage, alongside a terminal or in a shipyard also sits inside somebody's controlled area, so port, terminal or yard permission is needed as well. We hold standing operator approvals and work the site-specific approvals as the priority on a casualty call, but the honest answer is that the approval chain, not the aircraft, sets the timeline. Telling us the vessel's location and status at first contact is what shortens it.

SG Drone Inspections

What Is a Drone Marine Casualty Survey?

A drone marine casualty survey is the rapid, systematic photographic documentation of damage to a vessel or marine structure after an incident, flown from the air so that the whole affected area is recorded at close range and in context. It is not a condition survey and it is not a class survey. It is an evidence exercise, and its value is measured by how completely and how quickly the state of the vessel is captured before anything changes.

That urgency is the defining feature. After a casualty, the scene begins to degrade immediately. The vessel moves, is shifted to an anchorage or a berth, temporary repairs go on, salvage or firefighting damage is added to impact damage, and paint transfer and scoring at the contact are progressively obscured. A survey flown early captures a condition that will not exist a week later, and the record is what everything downstream — the repair specification, the claim, the apportionment discussion, the investigation — ends up referring back to.

Aerial capture is well suited to this because a damaged ship is exactly the sort of object that is difficult to photograph properly. The damage is usually high on the side, on the superstructure, or on a deck, and the conventional viewpoints are a launch at sea level looking up, or a person on a deck looking along. A drone gives the elevation and the standoff to see the whole impact zone at once, and then closes in on individual fractures without anyone going near an unstable structure.

Why This Matters in Singapore Waters

Singapore sits on one of the busiest stretches of water in the world, with a dense anchorage, constant crossing traffic and a large volume of bunkering, lightering and harbour craft movement. Contact incidents, allisions with berths and terminal structures, and collisions in and around the Strait are a routine feature of operating here rather than a rare event. The port is also a major repair and lay-up centre, which means a great many casualties from elsewhere in the region end up here for assessment and repair.

The regulatory expectation is immediate. A marine casualty or incident involving a Singapore-registered ship must be reported to the authorities, and serious occurrences may be taken up for formal safety investigation. Independently of that, class, hull underwriters and P&I interests will each want the damage established, and a repair yard will want a scope. All of those needs are served better by one thorough early capture than by several partial ones taken at different times by different parties.

The practical consequence is that the quality of the first record tends to determine how contested everything afterwards becomes. Where the above-water damage is comprehensively documented, geolocated and timestamped within hours, the subsequent discussion is about interpretation. Where it is not, the discussion is about what the damage actually was.

What We Document

Area	What We Capture	Why It Matters
Impact zone	Set-in, tearing, fracture and penetration of shell plating, with scale reference	The core of the claim and the repair scope; needs both overview and close detail.
Extent of deformation	Plating distortion running fore and aft of the contact, frame and stiffener lines	Damage almost always extends beyond the obvious hole; the true extent drives the repair.
Contact evidence	Paint transfer, scoring, rub marks, direction and angle of scraping	Helps establish contact geometry and relative motion between the vessels or structure.
Superstructure & accommodation	Damage to the block, bridge wings, windows, railings and external fittings	High damage is invisible from a launch and is the hardest area to survey conventionally.
Deck & cargo areas	Hatch covers, deck fittings, lashings, displaced or lost cargo, deck distortion	Aerial overhead capture records deck condition in a way no side-on viewpoint can.
Mooring & anchor arrangement	Hawse, anchor, chain, bitts, fairleads and damage from parted lines	Often central where the incident involved dragging, breakout or a failed mooring.
Fire & heat damage	Burn extent, distortion, coating loss, residual heat mapped with thermal imaging	Thermal shows the affected area and any remaining hot spots that visual capture misses.
Scene context	Overall vessel position, attitude, list and trim, surroundings and any pollution visible	Establishes the situation as found before salvage or repair activity alters it.

How a Casualty Call Runs

First contact. We need the vessel, its location and status — anchorage, alongside a terminal, in a yard or under tow — and who controls the area. That determines which permissions are needed and is the single thing that most affects how fast we can be there.
Permissions. A CAAS Activity Permit for the location and dates, plus the permission of whoever controls the water or the site: port or terminal authority, yard, or the vessel's own master and owner. Casualty work is prioritised but the approval chain still governs the timeline.
Safety assessment. A damaged vessel is an unstable environment. Flight planning accounts for structural instability, residual fire risk, pollution, ongoing salvage activity, and the movement of the vessel itself if it is not made fast.
Systematic capture. Overview passes establish context and overall condition first, then detail passes work the impact zone and each damaged area at close range with consistent overlap and scale reference.
Evidence handling. Original files are preserved unaltered with their capture metadata intact, and the record notes the time of survey relative to the incident and to any work already carried out.
Delivery. A structured damage record with annotated frames by area, plus the complete original imagery, issued to the owner or to whoever is coordinating the response.

Above and Below the Waterline

Aerial capture ends at the waterline, and in a marine casualty the underwater portion is frequently where the serious damage sits. A contact that leaves modest set-in above water may have opened plating well below it, and breach, rudder, propeller and shaft damage cannot be assessed from the air at all.

Casualty work is therefore usually scoped as a pair, with the drone taking everything above water and an ROV or diver inspection covering the submerged shell, appendages and running gear. Where the vessel proceeds to a formal in-water survey or a UWILD survey, the aerial record supplies the above-water half of the picture. For routine, non-incident work, our hull inspection and vessel inspection services cover condition surveys, and shipyard drone inspection covers vessels already in the yard.

Why Choose SG Drone Inspections

Fast, Complete First Record

The whole above-water condition captured in one systematic pass before movement, salvage or temporary repair changes what is there to be seen.

Angles No Launch Can Get

High side damage, superstructure and deck areas recorded from elevation and standoff instead of photographed upward from sea level.

Evidence Discipline

Timestamped, geolocated capture with original files preserved unaltered and the survey timing stated relative to the incident.

Paired With Underwater

Coordinated with ROV or diver inspection so the record covers the vessel as a whole rather than only the half that is visible from above.

Frequently Asked Questions

What can you document after a collision?

Everything above the waterline at close range — the impact zone with set-in, tearing and fracture; deformation extending fore and aft; bulwarks, railings and side shell openings; superstructure, accommodation and bridge wings; deck, hatch and cargo areas; anchor, hawse and mooring arrangement; and paint transfer or scoring that helps establish contact geometry. Thermal is added where fire or heat is involved.

Why not just send a surveyor in a launch?

Angle, coverage and speed. A launch sits at sea level and photographs a high-sided hull from below at an acute angle, and cannot see over the bulwark or into a damaged superstructure at all. A drone works at any height along the side, looks down into the damage, and covers the full hull in one overlapping capture. It also deploys faster, which matters when the condition needs recording before repair or salvage disturbs it.

Does this cover underwater damage?

No, aerial capture stops at the waterline, and in a casualty the submerged damage is often the more consequential part. The standard arrangement is a paired survey with an ROV or diver covering the submerged shell and running gear, compiled into one record. Where the vessel goes to a formal in-water survey or dry dock, the aerial record supplies the above-water half.

Will insurers and investigators accept the imagery?

Imagery is routinely relied on by owners, insurers, correspondents and surveyors when it is captured and handled properly — timestamped and geolocated, original files kept unaltered, context as well as close detail, and a clear statement of when it was flown relative to the incident and any subsequent work. We deliver the original unedited imagery with the report for that reason. Admissibility in any particular proceeding is a matter for the parties and their advisers.

How fast can you mobilise?

Permissions set the timeline, not the equipment. A flight needs an activity permit, and a vessel at anchorage, alongside a terminal or in a yard also sits inside a controlled area needing that party's permission. We prioritise the site-specific approvals on a casualty call, but the approval chain governs. Giving us the vessel's location and status at first contact is what shortens it.

Casualty Survey Enquiry

Tell us the vessel, its current location and status, and what happened. We will tell you what permissions are needed and how quickly we can be over it.

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