Air Cargo Management

Belly Cargo vs. Dedicated Freighters

• Belly Cargo: Freight, express parcels, and mail transported in the lower deck cargo hold beneath the passenger cabin of commercial passenger flights. Revenue generated provides high-margin ancillary income, but cargo dimensions are strictly constrained by passenger luggage volume.
• Freighter Cargo: Transported on dedicated all-cargo aircraft featuring main deck and lower deck cargo configurations without passenger seats (e.g., Boeing 747-8F, Boeing 777F), equipped with wide side cargo loading doors capable of accommodating oversized industrial machinery and heavy outsized pallets.

Concept of AWB: MAWB vs. HAWB

An Air Waybill (AWB) is the non-negotiable contract of carriage between the shipper and the airline, serving as receipt of goods, customs declaration, and delivery dispatch.

• Master Air Waybill (MAWB): Issued by the operating airline to a freight forwarder (acting as consignor) covering a consolidated shipment of multiple consignments on a specific flight.
• House Air Waybill (HAWB): Issued by an individual freight forwarder / consolidator to an individual commercial exporter, detailing their individual consignment within the consolidated master cargo.

Chargeable Weight & IATA Volumetric Divisor

Chargeable Weight is the weight figure upon which air freight charges are computed. It is defined as the higher of two values: Actual Gross Weight versus Volumetric (Dimensional) Weight.

$$\text{Volumetric Weight (kg)} = \frac{\text{Length (cm)} \times \text{Width (cm)} \times \text{Height (cm)}}{6,000}$$

• The standard international IATA volumetric divisor is $6,000\text{ cm}^3/\text{kg}$ (or $1\text{ m}^3 = 167\text{ kg}$).

Unit Load Devices (ULDs)

A Unit Load Device (ULD) is a standardized structural aircraft container or pallet used to consolidate freight and luggage into single modular units that lock securely into the aircraft cargo deck restraint tracks.

Two Common Types:

1. Contoured Aircraft Containers (e.g., AKE / LD3): Enclosed aluminum containers contoured to fit the curvature of lower deck wide-body holds.
2. Aircraft Pallets with Nets (e.g., PAG / PMC): Heavy-duty flat aluminum platforms where cargo is stacked and secured with high-tensile nylon restraint cargo nets.

11-Digit Air Waybill Numbering Structure

1. First 3 Digits (Airline Code Prefix): Identifies the issuing carrier according to IATA airline prefixes (e.g., `098` for Air India, `176` for Emirates, `285` for Nepal Airlines).
2. Next 7 Digits (Serial Number): Unique numeric sequential tracking number assigned to the consignment.
3. Final 1 Digit (Mod-7 Check Digit): Mathematical checksum digit calculated by dividing the 7-digit serial number by 7; the remainder equals the check digit, verifying data entry validity.

Freight Forwarder: Agent vs. Principal

1. Forwarder as an Agent:

• Acts on behalf of the commercial shipper to book cargo space with airlines, prepare customs declarations, and arrange trucking.
• Legal Liability: Acts purely as an intermediary broker; carries no personal liability for cargo damage or loss during transit provided reasonable professional diligence was exercised.

2. Forwarder as a Principal (Multimodal Transport Operator - MTO / NVOCC):

• Contracts directly with the shipper to transport goods from origin doorstep to destination doorstep across multiple transport modes (truck + air + customs clearance) under a single Through Bill of Lading / House AWB.
• Legal Liability: Assumes full carrier legal liability for cargo damage, delay, or total loss throughout the entire transport chain from shipper warehouse to consignee door.

Four Core Functions of an Air Waybill (AWB)

1. Contract of Carriage: Serves as prima facie legal evidence of the agreement between the shipper and the airline, binding both parties to international air law (Warsaw/Montreal Conventions) printed on the reverse side.
2. Proof of Receipt (Cargo Receipt): When signed by the airline cargo acceptance agent, the AWB certifies that the carrier has received the goods in apparent good order and condition.
3. Freight Bill & Invoice: Itemizes all freight charges, handling fees, insurance premiums, and customs duties, indicating payment status (Prepaid / PPD by shipper or Collect / COL by consignee).
4. Customs Declaration Document: Accompanies the flight cargo manifest, presenting certified declarations of commodity description, net weight, declared customs value, and origin to border customs inspectors.

TACT Air Freight Rating System

1. Minimum Charge (M): The lowest threshold fee an airline will charge for carrying any air consignment, regardless of how light its weight is.
2. General Cargo Rates (GCR): Standard baseline rates for general merchandise, structured into tiered Weight Breaks (Normal rate `N` for < 45 kg, quantity discount rates `Q` for +45 kg, +100 kg, +300 kg, +500 kg, +1000 kg).
3. Specific Commodity Rates (SCR): Special discounted promotional rates granted to designated high-volume commodity sectors over specific trade corridors (e.g., fresh cut flowers from Kenya to Amsterdam, handmade carpets from Kathmandu to Frankfurt).
4. Class Rates (Commodity Classification Rates - CCR): Percentage surcharges or discounts applied to the normal GCR for special commodities (e.g., surcharges for live animals, human remains, precious gold/banknotes; discounts for newspapers and periodicals).

Dangerous Goods Regulations (IATA DGR)

The 9 Hazard Classes:

• Class 1: Explosives; Class 2: Gases; Class 3: Flammable Liquids; Class 4: Flammable Solids; Class 5: Oxidizing Substances; Class 6: Toxic & Infectious Substances; Class 7: Radioactive Material; Class 8: Corrosives; Class 9: Miscellaneous Dangerous Goods (e.g., Lithium-ion Batteries, Dry Ice).

Mandatory Procedures:

1. UN-Certified Packaging: Goods must be packaged in certified performance-tested packaging (drop test, pressure test, stacking test) marked with the UN specification code.
2. Diamond Hazard Labels: Specific diamond-shaped hazard and handling orientation labels (e.g., “Cargo Aircraft Only”) affixed on opposite faces of each box.
3. Shipper"s Declaration for Dangerous Goods (DGD): A legally binding declaration signed by certified personnel detailing UN number, proper shipping name, class, packing group, net quantity, and emergency response telephone.

Air Cargo Terminal Warehouse Operations

1. Export Acceptance & Inspection: Physical counting of pieces against AWB, weighing on calibrated platform scales, dimension measuring, and package condition checks (checking for weeping cartons or punctures).
2. Security Screening: Mandatory 100% security screening via dual-view X-ray inspection or explosive trace detection (ETD) to prevent carriage of unmanifested explosives or weapons.
3. Buildup on ULDs: Cargo is contoured and systematically stacked onto ULD pallets according to heavy-on-bottom rules, covered with waterproof polyethylene sheeting, and strapped under nylon cargo nets.
4. Breakdown & Delivery: Arriving flights unload ULDs into the import warehouse, where cargo is de-consolidated against the flight manifest.
5. Cargo Irregularity Reporting: If cargo arrives damaged (Damaged Cargo), short (Short Shipped), or overcarried (Overlanded), a formal Cargo Irregularity Report (CIR) or Cargo Damage Report is immediately filed for insurance claim settlement.

INCOTERMS 2020 in Air Cargo Trade

INCOTERMS (International Commercial Terms) published by the ICC define the exact point of transfer of physical risks, transport costs, and export/import customs clearance responsibilities between seller and buyer:

1. EXW (Ex Works): Minimum seller obligation; buyer assumes all risks and costs from seller"s warehouse door (buyer arranges export customs, airport transport, and air freight).
2. FOB (Free on Board - maritime; FCA in air transport): Seller delivers goods cleared for export to the air carrier at the origin airport; buyer pays main air freight and destination charges.
3. CPT (Carriage Paid To): Seller contracts and pays the main air freight to the named destination airport; risk of loss transfers to the buyer as soon as the goods are handed over to the first air carrier.
4. CIP (Carriage and Insurance Paid To): Identical to CPT, but the seller is legally obligated to procure comprehensive all-risk cargo insurance coverage (Institute Cargo Clauses A) naming the buyer as beneficiary.

Air Freight Rating Calculation (15 Cartons Carpets: KTM - FRA)

(a) Total Actual Gross Weight:

$$\text{Total Gross Weight} = 15\text{ cartons} \times 32.0\text{ kg} = 480.0\text{ kg}$$

(b) Total Volumetric (Dimensional) Weight:

• Volume per carton:
  $$\text{Volume} = 120\text{ cm} \times 60\text{ cm} \times 50\text{ cm} = 360,000\text{ cm}^3$$
• Volumetric weight per carton:
  $$\text{Vol. Weight per carton} = \frac{360,000}{6,000} = 60.0\text{ kg}$$
• Total Volumetric Weight across all 15 cartons:
  $$\text{Total Volumetric Weight} = 15 \times 60.0\text{ kg} = 900.0\text{ kg}$$

(c) Chargeable Weight Determination:

$$\text{Chargeable Weight} = \max(\text{Gross Weight } [480.0\text{ kg}], \text{Volumetric Weight } [900.0\text{ kg}]) = 900.0\text{ kg}$$

The shipment is “volumetric / light cargo”; charges are assessed on 900.0 kg.

(d) Applicable TACT Weight-Break Rate Tier:

• The chargeable weight of 900.0 kg falls into the +500 kg weight break tier.
• Applicable base rate = USD 3.10 per kg.

(e) Complete Cost Breakdown:

1. Basic Air Freight Charge:
   $$\text{Weight Charge} = 900.0\text{ kg} \times \text{USD } 3.10 = \text{USD } 2,790.00$$
2. Fuel Surcharge (FSC):
   $$\text{FSC} = 900.0\text{ kg} \times \text{USD } 0.85 = \text{USD } 765.00$$
3. Security Surcharge (SSC):
   $$\text{SSC} = 900.0\text{ kg} \times \text{USD } 0.15 = \text{USD } 135.00$$
4. AWB Documentation Fee: Flat USD 30.00.

$$\text{Total Freight Cost} = 2,790.00 + 765.00 + 135.00 + 30.00 = \text{USD } 3,720.00$$

Final air cargo invoice amount payable is USD 3,720.00.

End-to-End Cold Chain Operational SOP (Fresh Perishables to Doha)

(a) Pre-Cooling & Packaging Standards:

• Fresh Trout (0°C to 2°C): Gutted, washed in chilled ozonated water, packed inside leakproof polystyrene (EPS) insulated boxes with leak-proof absorbent pads. Uses sealed dry gel ice packs (wet ice prohibited due to leakage risks damaging aircraft wiring).
• Cut Orchids (8°C to 12°C): Stem ends inserted into individual water vials with rubber caps, packed in ventilated fiberboard cartons with shredded paper cushioning to prevent chilling injury.

(b) Temperature-Controlled ULD Selection:

• Utilize Active Refrigerated Containers (Envirotainer / CSafe RKN/RAP) equipped with battery-powered compressor cooling and electrical heating, capable of maintaining set temperatures (±1°C) autonomously for up to 72 hours without external power.

(c) Airport Ramp Thermal Protection (TIA to Doha):

• Store in TIA Cargo Complex Cold Room until final aircraft loading.
• Transport across the airport tarmac using thermal reflective foil covers (Cool-Covers) to shield cargo from scorching sunshine and asphalt radiant heat (often > 45°C on Doha tarmac).
• Priority Last-In / First-Out (LIFO) loading: loaded last into the aircraft lower deck, offloaded first upon touchdown.

(d) Contingency Protocols for Flight Delays:

• If an aircraft is grounded or delayed > 2 hours, notify ground operations immediately to offload the ULD or connect the active container to airport ramp auxiliary ground power cables (3-phase electric supply) to keep cooling compressors running continuously, preventing temperature spikes and spoilage.