"We have a 6.2 m wide machine frame, Class 9 with lithium batteries inside, going to Doha. Our forwarder says the surveyor can come this week and we can sort the DG approval afterwards. Is that fine?" That email landed on a Tuesday. The short answer is no, and it is not paperwork pedantry. If you are trying to work out how to ship oversized dangerous goods to Qatar, the order in which two approvals are issued decides whether your cargo sails or sits on the quay.
The rule is blunt: the DG approval must land before the OOG survey, never after. The DG approval is granted against a declared set of numbers. The OOG survey is what produces the final set of numbers. Reverse the order and you are asking a carrier to approve cargo it has not yet measured, then amend the approval once the surveyor hands in real dimensions.
Why the sequence is not negotiable
A carrier approves dangerous goods against fixed data: UN number, IMDG class, packing group, length, width, height, gross weight and centre of gravity. Once that approval reference is issued, it is tied to those figures.
The OOG survey then confirms what is actually on the ground. If the surveyed overhang is 40 cm longer than declared, the approval no longer matches the cargo. That is not a correction, it is a re-approval, and it goes back to the beginning of the queue.
There is a second layer in Qatar. Oversized units at Hamad Port need a lifting and stowage plan built from surveyed dimensions. A DG approval with stale dimensions cannot feed that plan, so the terminal review stalls too.
Approval first, survey second. Every amendment you avoid is a sailing you keep.
The correct order of operations
- Fix the classification. IMDG class, UN number, proper shipping name, MSDS and, for lithium batteries, the UN38.3 test summary. Machinery with installed batteries is usually Class 9.
- Fix the dimensions and weight. Measure before you book, including lashing points and any protruding axles. Do not estimate.
- Apply for DG approval. Submit to the carrier with the dimensions you intend to ship. Flag any transhipment port on the routing.
- Wait for the approval reference in writing. Verbal acceptance is worth nothing when the SI is filed.
- Then book the OOG survey. The surveyor measures, photographs and issues a report that matches the approved figures.
- File SI and VGM before the SI cut-off, with the surveyed dimensions, not the booked ones.
- Submit the lashing and securing plan for carrier and terminal sign-off.
Pitfalls that cost the most
Pitfall 1 - Surveying too early. A survey report dated before the DG approval is a document the carrier cannot use. You pay for the survey twice.
Pitfall 2 - Ignoring the transhipment leg. Many Qatar services relay through Jebel Ali, and some routings touch Salalah. Each transhipment port applies its own DG acceptance rules. A Doha approval does not automatically clear the UAE leg.
Pitfall 3 - Soft declarations. Booking an oversized unit as general cargo to dodge the DG process is the single most expensive shortcut. Rejected DG at Hamad Port means fines, delays and a cargo that nobody wants to handle.
Pitfall 4 - Treating the SI cut-off as flexible. An amendment filed after the cut-off usually misses the vessel. On OOG plus DG cargo, the amendment also invalidates the approved dimensions.
Pitfall 5 - A quote that hides the extras. If your rate does not separate OOG handling, DG surcharge and survey costs, you are not comparing quotes, you are comparing guesses.
Charge items you should see broken out
| Charge item | What it covers | When it appears |
|---|---|---|
| Ocean freight (FCL) | Base slot cost to Hamad Port | At booking |
| DG surcharge | Carrier handling of declared dangerous goods | After DG approval |
| OOG handling | Extra space, flat rack or breakbulk stowage | After survey |
| Survey fee | Measurement, photography, survey report | Pre-loading |
| Lashing and securing | Materials and labour, plus plan approval | Pre-loading |
| Amendment fee | Any change after SI cut-off | Only if you get it wrong |
| Destination charges | Terminal handling and release at Doha | On arrival |
Expect the Persian Gulf rate itself to be the smallest line on that table. The DG and OOG items usually decide the final number, and a Red Sea surcharge may still apply on routings that pass the region before turning into the Gulf.
Qatar-specific points worth remembering
Qatar is not Saudi Arabia. SABER and SASO certification belong to the Saudi entry points such as Dammam and Jeddah. For Doha, the compliance conversation is about the DG declaration, the survey report and the terminal's handling capability at Hamad Port.
That changes if you sell on DDP terms, or if your routing clears through Jebel Ali in the UAE. Then a second set of documentation and a second customs regime enter the chain, and the DG acceptance has to be secured at both ends.
Cargo type matters as well. Heavy machinery and prefabricated building materials travel well as OOG but are unforgiving on lashing plans. Units containing lithium batteries need battery documentation before any carrier will look at the DG application. LCL is rarely viable for this cargo; oversized dangerous goods almost always move FCL or breakbulk.
If you are still mapping out how to ship oversized dangerous goods to Qatar, start from the approval, not from the vessel. Everything downstream, from the survey to the stowage plan to the SI, is built on that one document.
Pre-booking checklist
- IMDG class, UN number, MSDS and battery test summary ready.
- Final dimensions, weight and centre of gravity measured and recorded.
- DG approval requested in writing, with transhipment ports named.
- Written approval reference received before the surveyor is booked.
- Survey report cross-checked line by line against the approval.
- SI cut-off and amendment policy confirmed with the carrier.
- OOG, DG, survey, lashing and destination charges quoted separately.
Before booking, ask your forwarder for the DG approval reference, the survey schedule and a full destination charge confirmation in one email. If any of the three is missing, the sequence is already wrong, and the vessel will leave without you.