Key takeaways
- Provide grade-by-grade quantity and separation information.
- Keep usable space distinct from advertised capacity.
- Ask how a changed split affects the accepted arrangement.
- Treat surplus space as conditional until reviewed for a specific addition.
Describe the commercial parcel structure
List each grade or lot and explain why it is separately identified. Some distinctions may be documentary, while others require physical separation. Obtain the buyer’s actual requirement so the owner does not have to guess what the sales labels mean.
Tsuneishi publishes cargo-capacity information for its Kamsarmax design. Tsuneishi: Kamsarmax product information
A design specification is only screening context. It does not establish the usable arrangement for an individual ship, mixed parcel or voyage. Request the nominated owner’s assessment using the actual cargo inputs.
Identify the final authority over each grade quantity. A seller may control total supply while different buyers control their allocations. Reconcile those decisions before presenting the combined parcel as fixed.
Separate weight, volume and allocation
The owner needs appropriate weight and stowage information for each relevant component. Preserve the source and uncertainty of the data. Do not use one average factor to hide materially different parcels without asking whether that simplification is valid for review.
| Capacity question | Required input | Commercial implication |
|---|---|---|
| Total weight | Combined parcel and tolerance | Supported voyage-specific lift |
| Component volume | Representative information by grade | Whether each portion fits its proposed space |
| Separation | Buyer’s actual requirement | Feasible compartment allocation |
| Discharge order | Receiver sequence | Access and arrangement review |
| Optional addition | Defined extra cargo | Fresh assessment within the whole plan |
The table is a coordination tool, not a loading calculation. Technical distribution and the shipboard arrangement remain with the master and responsible vessel team.
Ask the owner to identify the controlling constraint. If one grade cannot be accommodated as proposed, a different split may be more relevant than a larger headline vessel size. The commercial team should evaluate remedies linked to the actual issue.
Compare workable allocation options
An owner may offer several feasible arrangements. Keep each as a complete option with its quantities, separation assumptions and discharge sequence intact. Do not select the largest component from each and combine them into an unsupported parcel.
Ask the buyers whether a revised split meets their needs. An arrangement that maximizes total lift may leave one receiver short of a critical grade. Commercial usefulness matters alongside physical capacity.
If part of the parcel must remain at origin, agree its treatment before final commitment. Storage or a later shipment may need separate arrangements. Avoid pressuring the vessel review to absorb a quantity simply because the seller has already allocated it.
Record the accepted mix
For a current transaction, the owner-confirmed grade allocation is not provided; obtain current verified information.
The record should identify the nominated ship, cargo information, component quantities and destination sequence. If the final split is pending, the field should remain qualified rather than display an unreviewed sales total.
Reopen the affected review after substitutions or changed buyer allocations. The same total mass can describe a different arrangement. Obtain confirmation from the owner and relevant terminals before carrying the old acceptance forward.
Fictional case: a larger total disappoints a receiver
A fictional trader plans a mixed fertiliser shipment on a Kamsarmax candidate. The owner offers an arrangement with a larger total lift if the grade proportions change. The trader initially favors it because the overall quantity is higher.
One receiver, however, needs the original amount of a particular grade. The revised mix would not satisfy that order. The trader asks the owner to assess a smaller total that preserves the required component and compares it with another vessel proposal.
The selected arrangement meets the actual buyer requirements rather than maximizing one aggregate number. The case illustrates why grade allocation belongs in the capacity decision from the outset.
Common mistakes
Do not treat every grade distinction as either automatically physical or automatically documentary. Obtain the actual separation requirement.
Avoid selling apparent spare space before the owner reviews the proposed addition. The accepted arrangement may explain why that space remains unused.
Do not assume a quantity tolerance permits any change in grade proportions. Check the current text of relevant commercial terms with appropriate advisers and reconcile the option with vessel acceptance.
Where Zeaclub fits
Zeaclub provides a multi-party shared workspace for owners, charterers, brokers and port agents.
Zeaclub offers digitalised procedures across the voyage workflow.
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Educational information only; not legal, financial or trading advice. Contract wording and applicable rules control. Verify current requirements and obtain qualified advice before acting.
Frequently asked questions
Why can total capacity be misleading for mixed cargo?
The parcel may require separate spaces or a particular discharge order. The owner must assess that configuration rather than treat all advertised capacity as freely interchangeable.
Should every grade have separate stowage information?
Provide the information relevant to the actual components and identify its basis. The responsible reviewer can determine whether a combined planning assumption is appropriate.
Can a smaller total be commercially preferable?
Yes, if it preserves the quantities and sequence buyers actually need. Evaluate the usefulness of the accepted allocation rather than maximizing total lift without considering its composition.
What should happen after a buyer changes its allocation?
Notify the owner and affected coordinators, provide the revised split and obtain confirmation of the arrangement. Keep sales, terminal and vessel records aligned with the same final version.