What Is Jetty Structure Drone Inspection?
A marine jetty is the working interface between a ship and the shore — the structure that carries product piping, loading equipment and personnel out over the water to a berthed vessel. At Singapore's oil, gas and bunkering terminals, from the Jurong Island petrochemical berths to the port's product jetties, these structures move enormous volumes of hydrocarbon and cargo every day. Their integrity is a direct safety and continuity concern, and keeping them in service means inspecting them thoroughly without shutting the berth down for long.
Jetty structure drone inspection is the above-water, topside survey of that entire asset: the trestle steelwork and deck that carry the loads out over the sea, the marine loading arms and swivels that connect to the ship, the product and utility piping running the length of the jetty, the supports and racks that hold that piping, the walkways and handrails, and the topside of the mooring and breasting dolphins that restrain the vessel. A drone images every one of these elements from a safe standoff over the water, capturing corrosion, coating breakdown, structural damage and mechanical wear in high resolution.
This is a distinct discipline from general industrial plant inspection. A jetty sits in the harshest corrosion environment on any terminal, it is operationally busy, and much of it is physically hard to reach safely over open water. The methods that work on a landside tank farm do not transfer cleanly to a structure suspended above the tideline — which is exactly why a focused topside inspection approach matters here.
Why Marine Jetties Demand Specialist Topside Inspection
The defining challenge of a jetty is its environment. The structure sits permanently in the marine splash and atmospheric corrosion zone, categorised by ISO 9223 among the most aggressive corrosivity classes for steel. Constant salt spray, high tropical humidity and tidal wetting keep chloride-laden moisture in near-permanent contact with the steel, the piping and their protective coatings. Corrosion rates here run well above those of a comparable inland facility, and the failure typically starts where it is hardest to see: at coating edges, weld toes, bolted connections and the underside of pipe supports.
Access compounds the problem. A jetty is a live operational berth, often with vessels alongside and product moving through the arms. Traditional inspection means erecting scaffolding out over the water, rigging rope access on the trestle and loading arms, or sending technicians over and under the deck — all high-risk, slow, and disruptive to berth availability. Every hour the berth is cordoned off for access is an hour it cannot load or discharge a ship.
The consequence of undetected deterioration is serious. Section loss in the trestle steel, a corroded pipe support that lets a product line sag, coating failure that becomes a leak path, or mechanical wear in a loading arm swivel can each escalate from a maintenance item to a containment or structural event. Specialist topside inspection exists to surface these conditions early, on a cycle tight enough to match the aggressive corrosion the environment drives.
Jetty Topside Elements & Defects We Survey
Our inspections are structured around the way each part of a jetty topside deteriorates in service. Every finding is imaged, located to a structural or line reference, and compiled for the terminal's integrity engineers.
| Element | Typical Deterioration | Why It Matters |
|---|---|---|
| Trestle & deck steelwork | Coating breakdown, salt-driven corrosion and section loss at welds, connections and edges | The steel carries the whole jetty and its loads out over the water — section loss compromises structural capacity. |
| Marine loading arms & swivels | Coating loss, corrosion, mechanical wear at swivel joints, counterweight and hose condition | The arms are the moving connection to the ship; wear and corrosion threaten containment during transfer. |
| Product & utility piping | External corrosion, coating failure, corrosion under insulation edges, flange and support-point wastage | A leak path on a live product line is a containment and fire risk; assessed against API 570. |
| Pipe supports & racks | Corrosion at contact points, seized or failed supports, coating loss on rack steel | Failed supports let piping sag or over-stress, transferring load into the line and its welds. |
| Walkways & handrails | Corroded grating, wasted handrail and toe-plate steel, loose fixings | A personnel-safety issue on a live berth where crews access the arms and mooring points. |
| Mooring & breasting dolphins (topside) | Corrosion of topside steel, quick-release hook and bollard condition, fender attachment above water | Mooring points restrain the vessel; topside deterioration affects safe berthing. |
| Fire, foam & utility lines | External corrosion and coating loss on firefighting mains, foam lines and cable trays | The fire system must be dependable on a hydrocarbon berth; corrosion undermines readiness. |
How Drone Jetty Inspection Works
A drone flies pre-planned paths along and around the jetty, holding a consistent standoff from the trestle, deck and piping so image scale and overlap stay uniform from the shore end out to the loading platform. Because it works from the air over the water, it reaches the underside of the deck, the outboard face of the trestle and the full height of the loading arms — vantage points that are slow and hazardous to reach by scaffold or rope.
Two capabilities run in parallel. High-resolution visual capture resolves the detail that governs a topside assessment: coating condition, corrosion products and pitting on the steel, weld-toe and connection wastage, mechanical wear on loading arm swivels, and the state of pipe supports along every run. Radiometric thermal imaging adds a second layer, flagging insulation anomalies on product lines, wet or damaged insulation and temperature signatures that can indicate a developing problem behind cladding — cues a visual-only survey cannot see.
The advantages over scaffolding and rope access on a live berth are decisive:
- Berth stays workable — no scaffold out over the water and no rope rigging on the arms means far less disruption to vessel loading and discharge.
- No crews over or under the deck — the topside is imaged from the air, removing work-at-height and over-water exposure for inspectors.
- Complete topside coverage — trestle, deck underside, piping runs and loading arms are all captured, not just the lines an abseiler can reach on each descent.
- Traceable evidence — every finding is geo-tagged and located to a structural grid or line reference, giving your integrity team an auditable record.
After capture, the imagery is assembled and each defect is annotated, described and referenced against the applicable standard — oil & gas piping against API 570, loading arms against OCIMF marine loading arm guidance, and the structural steel against recognised maintenance-inspection practice — then compiled into a data package the terminal's engineers use to plan repair and maintenance.
Topside Scope — and What Sits Below the Waterline
It is important to be clear about the boundary of this service. A jetty structure drone inspection covers the above-water topside: everything from the deck and trestle steel down to the tideline, plus all the piping, arms and mooring hardware carried on the structure. This is the domain where an aerial drone genuinely excels.
What lies below the surface calls for different tools. The underwater piles, the subsea and riser sections of pipelines, and the splash zone at and just below the waterline are inspected by remotely operated vehicles or divers. If your berth needs that scope, our underwater pipeline inspection and port infrastructure inspection services address the subsea structure, while a topside drone survey handles everything above the water. Run together, they give a terminal a continuous integrity picture from seabed to deck without over-claiming what any single method can see. For a broader look at the full berth including its marine approaches, see our jetty inspection overview.
Standards & the Singapore Terminal Context
A jetty topside inspection draws on several established references. Product and utility piping is assessed against API 570, the in-service inspection code for process piping, which governs external condition, corrosion and support integrity. Marine loading arms are reviewed with reference to OCIMF marine loading arm guidance, the industry standard for the design, maintenance and inspection of ship-to-shore transfer equipment. The structural steel of the trestle, deck and dolphins is examined against recognised structural steel maintenance-inspection practice appropriate to a marine atmospheric-zone asset.
In Singapore, these berths operate within the port framework administered by the Maritime and Port Authority (MPA), and many sit within the high-consequence petrochemical cluster on and around Jurong Island. That context raises the bar on both integrity and on minimising berth downtime — every inspection has to deliver dependable data while keeping a commercially critical berth available. A drone-based topside survey is well matched to both demands: thorough coverage of the structure and piping, captured in a short operating window without the days of scaffold erection a conventional inspection would require.
What We Inspect on a Jetty Topside
Our methodology adapts to the layout of your berth, but a full topside survey concentrates on four connected areas.
Trestle & Deck Structure
The primary steelwork carrying the jetty out over the water — beams, bracing, deck plate and connections. We image coating condition, corrosion and section loss at the welds, edges and joints where marine attack concentrates.
Loading Arms & Piping
Marine loading arms, swivel joints, counterweights and hoses, plus the full run of product and utility piping. Focus on coating breakdown, external corrosion, corrosion-under-insulation edges and mechanical wear on the arms.
Pipe Supports & Racks
The supports, shoes and rack steel that carry the piping across the trestle. Contact points and undersides are prime corrosion sites; we survey for wastage, seized supports and coating loss that let lines over-stress.
Walkways & Mooring Topside
Access grating, handrails and toe plates, and the topside steel of mooring and breasting dolphins including hooks and bollards. Personnel-safety and berthing-critical items assessed for corrosion and fixing condition.
Why Choose SG Drone Inspections
We are a specialist industrial and marine drone inspection provider in Singapore, focused on delivering accurate, fully-referenced topside data that terminal integrity teams can act on.
CAAS-Permitted Operations
Our drone operations run under the required CAAS operator and activity permits, and we manage the airspace approvals and terminal permit-to-work coordination that flying over a live berth demands.
Visual + Thermal in One Sortie
We combine high-resolution visual capture with radiometric thermal imaging on the same flight, so insulation and moisture anomalies on product lines are caught alongside structural and coating defects.
Standards-Referenced Reporting
Findings are referenced to API 570 for piping, OCIMF guidance for loading arms and recognised structural practice for the steelwork, so the data slots into your integrity management process.
Minimal Berth Disruption
Working from the air over the water avoids scaffold and rope rigging, letting much of the survey happen around vessel movements and keeping a commercially critical berth available.
Frequently Asked Questions
Get a Jetty Structure Inspection Quote
Send us your terminal, berth type and the topside scope you need. We reply with an inspection plan and quote within 24 hours — no obligation.