TL;DR: A drone inspection survey in Melbourne puts a high-resolution UAV in front of Port of Melbourne quay cranes, Altona and Geelong refinery stacks, Latrobe Valley boilers and chimneys, and bayside tank farms — capturing crack, corrosion, and coating detail at 1–3 mm/pixel without scaffold, EWPs, or rope crews working over live plant. Industrial Spatial Solutions flies under a CASA Remote Operator Certificate, removes people from height for data capture, and hands back a geotagged defect register your engineers can act on, usually within three to five business days.
Key takeaways
- A drone inspection survey Melbourne operators commission typically images a ship-to-shore crane, a refinery stack, or a turbine-hall structure in a single half-day sortie that would otherwise need scaffold or rope access — cutting inspection time 60–80% and eliminating the highest-risk fall task under the Victorian OHS Regulations 2017.
- ISS captures close-range imagery at 1–3 mm/pixel ground sampling distance, resolving hairline cracks, weld-toe defects, and coating breakdown to the standard expected of a hands-on close visual inspection under AS 4100 (steel) and AS 3788 (in-service pressure equipment external condition).
- The same payload and method suit Melbourne's signature assets: the Swanson, Webb, and Appleton Dock crane fleet, the Viva Energy Geelong refinery and Altona petrochemical stacks, the Latrobe Valley brown-coal generation fleet, and the Coode Island and Yarraville tank farms around Port Phillip.
- Every image is geotagged and, where ground control is observed, defects are located to within 20–50 mm on a 3D model — so corrosion on a quay-crane boom or a fatigue crack at a boiler tie-in is measured against the last inspection, not guessed.
- Single-asset inspections typically run AUD $2,000–$6,000; ISS mobilises from its base with pilots and surveyors inducted for the Port of Melbourne maritime-security regime and the major Victorian refining and power sites.
Why Melbourne assets need a drone inspection survey
Melbourne's industrial inventory is tall, corroded, and rarely idle — exactly the inventory a drone inspection was built for. The Port of Melbourne is Australia's largest container and general-cargo port, moving roughly 3 million TEU and well over 100 million tonnes of cargo a year through the Swanson, Appleton, and Webb Dock precincts, and the steel that handles that throughput is precisely what is hardest to reach safely: ship-to-shore quay cranes, rail-mounted gantries, conveyor galleries, and wharf superstructure standing in salt air over a working berth. Add the refinery and petrochemical stacks at Viva Energy Geelong and the Altona complex, the brown-coal boilers, precipitators, and chimney stacks of the Latrobe Valley, and the bulk-liquid tank farms at Coode Island and Yarraville, and the access problem repeats across every sector.
The conventional answer — scaffold, an elevated work platform, or rope-access technicians — is slow, expensive, and puts people at height over live plant and operating machinery. Falls from height remain one of the leading causes of fatality in Australian heavy industry, and the Victorian Occupational Health and Safety Act 2004 and OHS Regulations 2017 place a clear duty on operators to eliminate the fall risk so far as is reasonably practicable before relying on harnesses or platforms. A drone inspection survey removes the person from the hazard entirely for data capture, reaches the same surfaces in minutes, and flies a repeatable path that becomes the baseline for the next inspection.
The commercial case follows the safety one. Unplanned downtime in a container terminal, a refinery, or a baseload power station runs to tens of thousands of dollars an hour, and a defect found early — coating breakdown on a stack liner, a fatigue crack at a crane boom node, corrosion thinning on a tank shell — is a planned repair rather than a forced outage. A drone lets you inspect more assets, more often, for less.
Key point: A drone inspection survey is not a substitute for a structural engineer's assessment — it is a far better way to feed one. On a Port of Melbourne crane or a Geelong refinery stack, the UAV captures the evidence safely and repeatably; the engineering judgement stays with a competent person who classifies each defect against AS 4100, AS 3788, or the asset-specific criteria.
This page covers how ISS delivers UAV visual inspection across Melbourne, Geelong, and the Latrobe Valley. For the wider regional picture, see our Melbourne industrial survey hub; for the full technical background on method, payloads, and standards, see our drone visual inspection service.
Local applications: Melbourne assets a drone inspects best
The common thread across Victoria's industrial inventory is that height, corrosion, and continuous operation combine on the same structure — precisely where a drone inspection survey removes risk while keeping the asset working.
Port of Melbourne cranes, conveyors and wharf steel
The Swanson, Webb, and Appleton Dock terminals run ship-to-shore quay cranes and rail-mounted gantries loading and discharging vessels around the clock, fed by conveyor and intermodal infrastructure that is high, corrosion-prone, and inside a secured, actively-operating port. A single drone sortie images a crane boom and A-frame, the festoon and trolley structure, and the adjacent wharf superstructure — coating condition, weld cracking, and structural corrosion in the salt-laden bay air — without standing the berth down or building scaffold over a live quay. The same flight complements the crane-rail and conveyor alignment work ISS already performs at the port.
Geelong and Altona refining and petrochemical stacks
The Viva Energy Geelong refinery — one of only two operating refineries left in Australia — and the Altona petrochemical complex carry tall process stacks, flare structures, fractionation columns, and pipe-rack steel that are hot, chemically aggressive, and surrounded by hazardous-area constraints where stand-off cannot safely be reduced by hand. A long-range optical zoom payload captures defect detail from a safe distance, and a radiometric thermal sensor adds anomaly detection for hot spots, blocked or wet refractory, and lagging defects, all flown without a hot-work or confined-space permit for the capture phase.
Latrobe Valley power-plant structures
The valley's brown-coal fleet — AGL's Loy Yang A, Alinta's Loy Yang B, and EnergyAustralia's Yallourn — runs ageing boilers, precipitators, cooling towers, and chimney stacks under a managed energy transition, where structural condition matters more with every operating year. A UAV captures stack-liner and shell condition, boiler-house external steel, and cooling-tower structure quickly during shutdown windows, and the same imagery feeds the as-built and decommissioning capture that follows each station toward closure.
Bayside tank farms and bulk-liquid terminals
The Coode Island and Yarraville tank farms and the Geelong fuel terminals sit in a corrosive bayside environment where roof, shell, and bund-wall condition deteriorates continuously. Drone imagery of tank roofs and upper shell courses — faces that are awkward and hazardous to reach on foot — captures coating breakdown and section loss for inspection planning, complementing the floor-settlement and shell-verticality work surveyed from the ground.
Method and equipment
A drone inspection survey is only as good as its optics, its stability in bay wind, and the discipline of the flight. ISS flies a structured, non-contact workflow that, for most Melbourne assets, can be done while the plant is running.
ISS begins with scoping and a CASR Part 101 airspace assessment — important in metropolitan Melbourne, where Port Phillip operations, Essendon and Avalon aerodromes, and dense controlled airspace all bear on flight planning. A JSA defines the exclusion zone around people and live plant, and at the Port of Melbourne the assessment is coordinated with the maritime-security regime and terminal operators. Where defects must be located on a 3D model or compared between inspections, the crew observes ground control with Leica or Trimble GNSS and total-station equipment, referenced to MGA2020 / AHD; for pure condition imagery this step can be omitted.
The inspection is then flown as a series of controlled passes at a fixed stand-off — typically 3–10 m from the surface — to hold a consistent GSD, using terrain- and structure-following missions on complex geometry so coverage and overlap are guaranteed. ISS flies high-stability multirotor platforms carrying mechanical-shutter RGB sensors in the 20–45 MP class, which at a 5 m stand-off resolve roughly 1–1.5 mm/pixel — fine enough for hairline cracking and early coating breakdown. For hot refinery stacks, energised switchyards, and hazardous areas, an optical zoom or radiometric thermal payload captures the same detail from a safe distance. Before demobilising, imagery is QA'd on site against the asset map so a missed face costs minutes, not a return mobilisation.
Key point: Stand-off distance, not just sensor megapixels, sets the achievable detail. A 45 MP sensor flown at 15 m resolves less than a 24 MP sensor flown at 4 m. The skill on a Melbourne quay crane or a Geelong stack is flying close and steady enough, safely, to capture the GSD the defect actually requires — in bayside wind, near live conductors, hazardous areas, and operating machinery.
| Parameter | ISS specification | Typical benchmark | Notes |
|---|---|---|---|
| Image GSD (close range) | 1–3 mm/pixel | 5–10 mm/pixel | At 3–10 m stand-off |
| Smallest resolvable defect | ~0.5 mm crack width | ~2 mm | Subject to lighting and surface |
| Defect location (georeferenced) | 20–50 mm | 100 mm+ | With ground control |
| Thermal sensitivity | <0.05 °C NETD | 0.1 °C | Radiometric payload |
| Coverage completeness | 100% of nominated faces | Spot checks | Verified against asset map |
Standards and compliance
The inspection itself is conducted against the standard relevant to the asset — AS 4100 for structural steel on cranes, gantries, and conveyor trusses; AS 3788 for the external condition of in-service pressure equipment, directly relevant to refinery vessels and tank-farm storage; AS 1418 and AS 2550 for cranes and runways at the port; and asset-specific criteria for boiler, stack, and cooling-tower structures in the Latrobe Valley. ISS records the standard applied, the inspector's competency, and a measurement-confidence statement with every report.
Aviation compliance is governed by CASA under CASR Part 101 and the associated Manual of Standards. ISS operates under a current Remote Operator Certificate (ReOC) with licensed RePL pilots, registered aircraft, and aviation-endorsed public liability cover, and manages all airspace approvals on the client's behalf — a real advantage in metropolitan Melbourne, where controlled airspace, aerodrome proximity, and port operations routinely require coordination. Workplace safety sits under the Victorian OHS Act 2004 and OHS Regulations 2017, with WorkSafe Victoria as the regulator, and georeferenced deliverables are tied to MGA2020 / AHD so defect positions integrate directly with client engineering and GIS systems.
⚠️ Watch out: A drone inspection does not by itself satisfy every mandated inspection regime. Some pressure-equipment, crane, and refinery standards still require hands-on or NDT inspection at defined intervals. Used well, a UAV survey extends the interval between intrusive inspections and targets them where defects actually appear — it does not blindly replace them. ISS confirms the regime that applies to your asset during scoping.
Deliverables and cost
For most Melbourne clients the core deliverable is a defect register — each defect located, photographed, severity-rated, and matched to a recommended action — alongside the raw geotagged imagery. Where the asset is inspected repeatedly, ISS adds an orthomosaic of each face, a textured 3D inspection model with defects pinned in 3D, a thermal report, and a comparison report that shows change against the previous baseline rather than just current state. Reports are typically delivered within three to five business days.
| Factor | Impact on cost | Typical range |
|---|---|---|
| Asset height and complexity | More faces and tighter geometry mean more capture and review | $2,000–$6,000 per asset |
| Airspace and exclusion zones | Port maritime-security, controlled-airspace, and live-plant approvals add coordination | +$500–$2,000 |
| Required GSD | Finer detail means closer, slower flying and more images | Baseline to +30% |
| Deliverable depth | Raw imagery vs defect register vs georeferenced 3D model | +20–60% |
| Thermal payload | Adds capture and a second analysis pass | +$800–$1,500 |
ROI context: A single rope-access campaign on a major refinery stack or a Port of Melbourne quay crane can run well past AUD $30,000 once access, standby, and downtime are counted — and it puts people at height over live plant. A drone inspection survey covering the same asset typically costs a fraction of that, captures more, and removes the fall risk, so the payback is usually realised on the first inspection, before any defect is even found.
Why ISS in Melbourne
ISS is an independent industrial surveying firm — not tied to any aircraft brand or maintenance contractor — so a drone inspection survey Melbourne clients commission serves the asset, not an upstream agenda. Our pilots and surveyors hold the Port of Melbourne maritime-security inductions, current construction and working-at-heights tickets, and the local knowledge that matters in Victoria: which bayside-wind windows are flyable, how the port's exclusion zones work around an operating berth, how hazardous-area constraints shape a flight over a Geelong or Altona process unit, and how to coordinate near Melbourne's controlled airspace and aerodromes.
Crucially, the same team that flies the UAV and aerial surveys also runs our mechanical and engineering survey work across Victoria — crane rail, conveyor alignment, tank dimensional control, and 3D laser scanning. So when a drone inspection finds something that needs measuring, ISS can bring a total station or scanner to bear without re-engaging a new contractor. The drone inspection becomes the front end of a complete condition and dimensional picture, with a competent person classifying defects against the right standard at the end of it.
Frequently asked questions
Can you inspect Port of Melbourne cranes or a refinery while it is running?
Usually, yes. The capture is non-contact, so most live assets — quay cranes, conveyor galleries, refinery stacks, tank-farm shells — can be inspected without standing down operations, provided an exclusion zone is maintained around people and operating plant. Hot stacks and hazardous areas at Geelong and Altona, and energised switchyards, are flown from a safe stand-off using an optical zoom or thermal payload.
How do you handle airspace and port security in Melbourne?
ISS completes a CASR Part 101 airspace assessment during scoping and manages every approval as the Remote Operator Certificate holder. Metropolitan Melbourne routinely requires coordination with controlled airspace, aerodrome proximity, and the Port of Melbourne maritime-security regime; that coordination, the associated approvals, and the exclusion-zone planning around an active berth are handled on your behalf — you provide site access and inductions only.
How accurate is the inspection on a corroded crane boom or tank shell?
ISS captures imagery at 1–3 mm/pixel GSD on close-range work, which resolves hairline cracking, weld defects, and early coating breakdown — comparable to a hands-on close visual inspection under AS 4100 or AS 3788. Where geometry is required, ground control referenced to MGA2020 / AHD lets us locate each defect to within 20–50 mm on a 3D model, so corrosion or cracking is measured against the previous baseline.
Does a drone inspection satisfy our mandatory inspection requirements?
It satisfies many condition-monitoring and visual-inspection needs, but some pressure-equipment, crane, and refinery regimes still require hands-on or NDT inspection at defined intervals. A drone inspection survey is best used to extend those intervals and target intrusive inspections where they are needed. ISS confirms the regime that applies to your specific Melbourne, Geelong, or Latrobe Valley asset during scoping.
Request a quote
If access, height, or downtime is making your structural and asset inspections in Melbourne, Geelong, or the Latrobe Valley slow, expensive, or hazardous, a drone inspection survey is very likely the safer and cheaper path — and the payback usually lands on the first inspection. Tell us the asset, the site, and the defects you care about, and ISS will scope a fixed-price inspection, recommend the right payload and deliverables, and manage every part of the CASA, airspace, and port-security compliance.
Call 0407 057 015 to speak with a surveyor who already knows the Port of Melbourne, the Victorian refining belt, and the Latrobe Valley power fleet. ISS is CASA-certified and mobilises across Victoria.