An air charter for heavy or oversized cargo does not begin by booking an aircraft. It begins with a verified description of what must move, from where, to where and under which constraints. Dimensions, weights, centre of gravity, handling points and regulatory status form the basis of a safe, workable transport concept.
Every stage is connected. A packaging change may affect door clearance. A different airport may require a new road survey. A revised date may alter aircraft and crew availability. Planning must therefore treat the shipment as one coordinated technical project rather than a series of unrelated bookings.
1. Build an accurate cargo data set
The starting point is a cargo list with a unique reference, exact gross weight and dimensions for every piece. Complex shapes need technical drawings, photographs from several sides and details of protrusions or removable components. Measurements must describe the shipment in its transport condition, including packaging, skid and protective covers.
For heavy items, the team needs the centre of gravity, contact area, approved lifting points and any restrictions on orientation. It must know whether the piece can be tilted, whether it must remain level and whether particular lifting angles are prohibited. The packaging and base must withstand loading forces and the accelerations defined for flight restraint.
Regulated cargo requires correct classification and supporting documentation. Technical compatibility with an aircraft does not replace export, transit, import or dangerous-goods requirements.
2. Screen suitable aircraft types
The data is used to identify aircraft that may accept the shipment. The comparison covers usable door dimensions, fuselage cross-section, main-deck length, floor-loading limits and the available loading system. Engineers also examine how the piece will move from ground level into its planned position.
Published maximum payload is only a screening value. Actual payload depends on distance, fuel, weather, runway performance, airport elevation, temperature and operational reserves.
More than one aircraft option is often retained at this stage. A smaller freighter may reduce flight cost, while a larger one may provide safer loading clearances or enable a direct sector. The strongest option emerges only after the entire operation is evaluated.
3. Develop the loading and restraint concept
The next task is to prove how each piece passes through the door and reaches its assigned location. A geometrical check must include working clearances, not merely compare the cargo with nominal door dimensions. The planned movement considers loader or crane positions, changes in angle and safe access for the handling team.
Heavy cargo also needs a floor-load assessment. Steel plates, timber, beams or a purpose-designed transport frame may spread the load, subject to the operator’s approved method. Restraint must address longitudinal, lateral and vertical forces and use suitable attachment points on both the cargo and aircraft.
Final loading and restraint approval belongs to the aircraft operator and its authorised specialists. The project coordinator ensures that information from the manufacturer, packing contractor, ground handler and operator is consistent and available in time.
4. Verify departure and arrival airports
Airports are checked against the actual aircraft and handling method. The review covers runway performance, taxiways, apron strength, parking position, fire category, fuel, customs, security and operating hours. Oversized road cargo also needs a suitable route through the airport gate and across controlled areas.
Equipment availability must be proven. A mobile crane needs sufficient capacity at the real radius and boom configuration. High-loaders, ramps, transport platforms, spreader beams and certified lifting accessories must be available at the agreed time. Bringing specialist equipment from another location adds mobilisation, assembly and access requirements to the plan.
5. Survey the road connections
The shipment must reach the departure airport and continue after landing. A route survey may examine bridges, underpasses, turning radii, overhead lines, road strength, traffic restrictions and space at gates. Permits, escort vehicles, temporary road measures or coordination with local authorities may be necessary.
This work can change the airport selection. An airport that is ideal for the freighter is of little value if the cargo cannot reach its apron safely. Landside feasibility belongs near the start of planning rather than in the final week.
6. Map permits, customs and flight requirements
A charter may require landing permissions, overflight clearances, slots and cargo-specific approvals. For regulated material, requirements depend on the classification and the countries of origin, transit and destination. Customs documentation must match the actual shipment and chosen procedure.
Flight routing takes account of range, approvals, weather, airport limitations and crew duty time. Any technical stop must also be checked for aircraft compatibility, fuel, operating hours and regulatory acceptance. The schedule should include realistic time for these control points rather than represent only flying time.
7. Allocate responsibilities in an operational plan
Before execution, the parties need a timeline, named responsibilities and clear communication paths. The plan states who releases the cargo, verifies lifting equipment, arranges airport access, submits documentation, supervises loading and has authority to respond to a deviation.
A contingency plan should cover credible disruptions such as weather, delayed road transport, unavailable handling equipment, an aircraft technical issue or temporary airport closure. It may identify alternative timings, airports or equipment sources. The aim is not to pretend that every risk can be removed, but to reduce the time needed for an informed decision.
8. Confirm readiness before mobilisation
Shortly before the operation, aircraft status, crew, slots, permits, equipment, customs arrangements and cargo readiness are reconfirmed. Dimensions and weights must not change silently. A few additional centimetres caused by revised packaging can invalidate the agreed loading method.
9. Coordinate execution from collection to delivery
Operational control continues as the cargo moves by road, enters the airport, clears relevant processes, is loaded, flown and discharged. Road carrier, airport, ground handler, flight crew, customs representatives and receiver need a common timing picture. Updates should focus on decision-relevant facts rather than create parallel, conflicting instructions.
Jalog treats air transport for special cargo as a chain of linked engineering and operational decisions. Verified drawings, weights, locations and required dates provide the best basis for an initial assessment and allow unsuitable routes or aircraft to be removed before detailed commitments are made.
Frequently asked questions
How long does heavy-cargo charter planning take?
It depends on technical complexity, route, permits and aircraft availability. Some urgent movements can be assessed quickly, while oversized or regulated cargo may require engineering work and approvals with fixed lead times. Earlier preparation creates more feasible options.
Who approves the loading plan?
Final technical acceptance rests with the aircraft operator and its authorised experts. The shipper, manufacturer, packing contractor and coordinator provide accurate information and prepare the cargo according to the approved method.
Can the aircraft type be substituted shortly before departure?
Only after a fresh technical and operational assessment. Another type means different doors, floor limits, loading equipment and performance. It cannot be treated as a simple administrative substitution.
What most often forces a plan to be revised?
Unverified dimensions, inaccurate weight, missing centre-of-gravity data, packaging changes, unclear cargo classification and unavailable handling equipment are common causes. Critical data should therefore be confirmed before capacity is contracted.