Part one: the survey, phase by phase.
01Pre-survey
Record where the vessel starts.
- What happens
- Before any cargo moves, the survey drone flies to six draft marks on the receiving barge: bow, middle and stern on each side. Each reading is recorded with its place and time. Together they are the baseline that every later change is measured from.
- Illustrative checks
- Vessel reference, six mark readings, units and time.
- Record for review
- Baseline survey
Configured values at the end of the phase: mean draft 11.80 ft, 0 of 12 loads aboard, trim 0.00 ft.
02Ballast adjustment
Keep ballast apart from cargo.
- What happens
- Ballast water is taken on and the barge sits deeper before any cargo arrives. The drone reads the marks again and the rise is logged as ballast. Because it is recorded here, it is never counted as cargo later.
- Illustrative checks
- Baseline reference, tank contents, updated readings.
- Record for review
- Ballast record
Configured values at the end of the phase: mean draft 12.10 ft, 0 of 12 loads aboard, trim 0.00 ft.
03Crane position
Bring the crane to its ready position.
- What happens
- The crane lowers its boom and brings its open grab over the source barge. The drone scans the surface of the pile, and that scan sets where the grab will bite. The path to the receiving barge is set before the first load.
- Illustrative checks
- Pile scan, crane target, transfer path.
- Record for review
- Readiness record
Configured values at the end of the phase: mean draft 12.10 ft, 0 of 12 loads aboard, trim 0.00 ft.
04Cargo load
Follow each load to its own cell.
- What happens
- Twelve loads cross from barge to barge. Each goes to its own cell of the hold, working from bow to stern and taking the quay side and the water side in turn, so no part of the barge carries more than its share. The drone scans the pile before every bite, and every load leaves its own records: scan, target, lift, release, settle and return.
- Illustrative checks
- Scan before each load, twelve cells, in order, six records per load.
- Record for review
- Transfer history
Configured values at the end of the phase: mean draft 12.62 ft, 12 of 12 loads aboard, trim 0.30 ft.
05Trim correction
Level the vessel before the final readings.
- What happens
- With the cargo aboard, the stern sits a little deeper than the bow. Ballast is pumped from the aft tank to the fore tank until the marks at both ends read alike. No water comes aboard or leaves, so the total is unchanged, and the move is logged.
- Illustrative checks
- Fore and aft marks, ballast moved, level within tolerance.
- Record for review
- Trim record
Configured values at the end of the phase: mean draft 12.62 ft, 12 of 12 loads aboard, trim 0.00 ft.
06Final survey
Compare the result with the starting point.
- What happens
- The drone reads the six marks again and the final readings are set beside the baseline. The rise is split: the part logged as ballast is kept apart, and the rest is cargo. The result, and anything still open, goes to a person for review.
- Illustrative checks
- Baseline comparison, ballast kept apart, review required.
- Record for review
- Review package
Configured values at the end of the phase: mean draft 12.62 ft, 12 of 12 loads aboard, trim 0.00 ft.
Part two: the supply hub, step by step.
01Arrive
Twelve pallets wait in the receiving row. Drums, equipment cases, sandbags and totes stand sorted by type. Twelve marked places are ready for them inside the hub. Nothing counts as stored yet.
02Sort and stage
Each pallet goes to its own place. A forklift carries one pallet at a time and sets it down in its assigned place. A pallet on the forks is in transit: it is not counted until it rests. The drums and the cases are in; the sandbags are on their way.
03Count
Twelve places, twelve pallets. Every place holds its pallet and the receiving row is clear. The hub’s drone reads the yard, and the software keeps two numbers apart: what rests in storage now, and the deliveries made during the run.
In the simulation the hub’s work repeats: eight forklifts each carry their pallets into the hub and back to their rows, and both counts are kept for as long as the run lasts.
Part three: the loading bay, step by step.
01Ready
The trailer stands open at its ramp. Its three totes are staged in the marked bay beside it and the forklift waits. Each trailer has its own kind of load: drums for one, equipment cases, sandbags and totes for the others.
02First load, deepest
The first tote goes to the far end. The forklift carries it up the ramp and sets it down against the end wall. The count waits: the load is placed, and it is counted once it rests and the forklift is clear.
03Back toward the doors
The second and third go in front of the first. Each load has its own place, and the earlier ones stay where they were set: nothing is pushed deeper to make room. With the forklift clear of the trailer, the count reads three of three.
04Closed, ready to depart
Doors shut, and the trailer is counted ready. The doors are closed and latched and the ramp is clear. The bay’s drone reads the row of trailers, and the software records this one as ready to depart with its three loads.
In the simulation four trailers load at once, three pallets each: maintenance drums, survey equipment cases, sandbags and totes.
These walkthroughs use configured values and illustrative scenes. They show an intended workflow, not field performance or equipment acceptance, and they are not connected to the survey software or the running simulation.