Prysmian Submarine Cable: An Office Buyer’s Checklist

I’m the office administrator for a marine infrastructure contractor, not a cable engineer. That distinction matters. I don’t design the submarine link. My job is to make sure the engineers can buy it without creating logistics, customs, or finance problems.

I process 60 to 80 purchase requests a year. The highest-value orders usually involve Prysmian submarine cable, either for power delivery or fibre-optic communication. I don’t choose conductor size or fibre count. I do decide whether a purchase order is ready to sign.

Here is my six-step checklist. It won’t impress an engineer. It will catch expensive mistakes.

1. Send the engineering request back if it isn’t complete

Engineers are busy. I understand. But “same as last time” isn’t a purchase specification.

Before getting a quote, my internal request form needs at least:

• the Prysmian product family — power cable, fibre optic cable, or hybrid system
• total route length and drum breaks, if the site can’t handle one continuous drum
• voltage level, conductor size, or fibre count
• cable accessories — joints, terminations, cable cleats, transition joints
• the design or testing standard required
• delivery location and expected delivery date
• storage method, if the cable will sit on site before installation

Most engineering requests arrive about 80% complete. The missing 20% is what causes rescheduling.

2. Check the manufacturer, the distribution route, and the paper trail

In cable buying, the phrase “equivalent to Prysmian” shows up in quotes. Sometimes the project allows equivalents. Sometimes it doesn’t. That decision should not be made by the buyer. I ask the project engineer to mark which manufacturers are acceptable.

If Prysmian is specified, I confirm that the quote identifies the product by catalogue number and factory reference. Then I ask for the document list before I approve anything:

• manufacturing location and factory certificate
• routine test certificate
• type test or design test certificate, if appropriate
• packing list
• delivery document

A hesitant supplier is a red flag. It doesn’t mean they are dishonest. It means the paperwork will probably be a problem later.

3. Plan the physical route before you accept a delivery date

A submarine cable drum is not a courier package. It can be heavy, wide, and difficult to move. If I approve an order before checking the physical route, the project can stop at a bridge.

I ask the supplier for the drum’s gross weight, diameter, width, and handling method. Then I check the receiving site: Is there enough hard standing? Can a truck turn around? Does the site need a crane or low-loader? Is any road permit required?

I made that mistake early in this role. The price was good, and the delivery date looked fine. The road to the site was not. The extra lifting and escort cost more than the initial saving. Not cute. Expensive.

4. Compare total landed cost, not just price per metre

Price per metre is a useful benchmark. It isn’t the whole cost.

When I compare two Prysmian submarine cable quotes, I list the full scope:

• cable unit price
• accessories and joints
• transport and offloading
• customs and import duties, if applicable
• road permits, escorts, or lifting equipment
• inspection or engineering support, if required
• storage or site security, if the cable arrives early

The lowest quote can still be the best quote. But I don’t know that until every item above appears on paper.

5. Make documentation a condition of supply, not an afterthought

As an office buyer, my real client is finance. A perfect technical quote can still cause an invoice rejection. I learned this the hard way when a supplier delivered good cable but poor documents. The invoice had no purchase order number, and the packing list didn’t match the delivery note. Finance rejected it. The supplier was frustrated. The project lost time.

Now I ask suppliers how their invoices will be structured before I send the PO. I do not wait until after delivery. I need:

• the correct PO number on every document
• clear line items that match the accepted quotation
• a description of the goods that matches the customs requirement
• signed delivery documents
• test certificates attached or available on request

This is unglamorous work. It is also the work that prevents project delays.

6. Ask what changed since your last order

What was best practice in 2020 may not apply in 2025. The fundamentals of buying cable have not changed: clear specification, approved supplier, complete documentation, and realistic delivery terms. But the execution has changed.

Prysmian’s product mix has expanded, factory assignments can shift, and manufacturing lead times are not static. If I call a supplier and say “same as last year,” I expect that answer to be questioned. I now ask: What has changed since our previous order? Are there new standards, new product codes, or longer lead times?

Sometimes the answer is “nothing.” Sometimes the answer saves the project.

Final reminders

Two mistakes still appear even with a checklist:

• Don’t let an old price quote make the decision. Confirm the validity date and include it in the PO.
• If cable accessories are not needed until installation day, keep them separate from the cable delivery so they don’t get misplaced.

The buyer is not responsible for engineering. The buyer is responsible for what supports the engineering: correct scope, verified manufacturer, workable logistics, honest documents, and a clean purchase order. When that part is done well, a submarine cable project can finally do its real work.