How Is Parcel Separation Done on Mixed Cargo Shipments?

A parcel is a lot of cargo covered by one bill of lading or destined for one receiver. A single vessel may carry dozens of them: steel plates in different dimensions, rebar in different grades or bagged goods for several buyers.

Separation is the way these parcels are stowed so they can be told apart. The goal is for every receiver to collect only its own cargo with as little rehandling as possible. The method depends on the commodity, the hold configuration and the port rotation.

The most reliable approach is giving each parcel its own hold, or a clearly bounded section of a hold. That is not always possible, so in practice several methods are combined.

The choice should balance ease of discharge with protection of the cargo.

Dunnage is timber, plywood, airbags or similar material used to protect cargo from the ship's structure, from other cargo and from moisture, to spread loads and to allow ventilation. It is an essential part of stowing steel coils, pipes and machinery.

Insufficient dunnage can leave cargo in contact with sweat on the tank top, allow a heavy parcel to crush the one beneath it, or let lots drift into one another. The supercargo compares the quantity and placement of dunnage with the instructions received.

On a multi-port voyage, cargo for the first discharge port has to sit on top or be easily accessible. Otherwise other parcels must be shifted to reach it, costing time and money and adding damage risk.

A stowage plan therefore has to account for discharge sequence as well as weight and volume. The supercargo checks that the sequence is respected during loading and flags how any late plan changes may affect discharge.

If the vessel will load more cargo after a partial discharge, it also helps to plan how the emptied spaces will be used without disturbing the remaining parcels. Such details matter most in tramp trades, where voyage plans change frequently.

Most problems on site start as small deviations between the plan and its execution. An instruction not passed on at a shift change, or a loading sequence altered because a crane broke down, is often enough.

Typical mistakes include similar-looking products stowed side by side without marking, a heavy parcel placed on top of a delicate one, separation sheets laid incompletely and hold allocation never updated on the stowage plan. Most of these are easy to correct if they are spotted while the ship is still working.

Simple measures help catch errors early: a brief handover talk at each shift change, an up-to-date parcel list at every hatch and a photograph of each hold before it is closed.

The right separation method depends on the physical nature of the cargo. Products that look alike but differ in grade or size carry the highest risk of mixing, so marking and accurate stowage records matter most for them.

Rebar of different diameters looks almost identical from a distance, steel plate thicknesses are only visible up close, and with bagged cargo in identical packaging the marks on the bags may be the only distinguishing feature. Steel coils add the question of tier and row arrangement, while pipes call for protected ends and a consistent stowage direction.

In practice, the main points are:

The supercargo marks on a working list which hold and tier each parcel goes into, photographs the laying of separation material and confirms hold distribution with the ship at the end of each shift. A final stowage plan that matches these records gives the discharge port team a reliable map.

The required separation and acceptable methods should be spelled out in the principal's instructions. Karan Gözetim can carry out this monitoring as part of its supercargo service from Gemlik, with the scope agreed at the quotation stage.