Bunkering Monitoring: Every Bunker Measured by Flowmeter

MANTRAZ bunkering monitoring measures every bunker while it happens: flow rate, density, temperature, mass and volume, with a live total refreshed every 60 seconds. It is for vessel owners, operators and fleet managers who want a measured record of each delivery instead of relying on paperwork and a tank reading taken afterwards.

Bunkering on trust

A bunker is one of the few moments when a large amount of fuel changes hands in a short time. Yet the office often learns how much arrived only from the delivery documents, after the fact. On board, the crew keeps an eye on the tank level while fuel keeps coming in. If the numbers are questioned later, there is little to go back to except what people wrote down and remember.

How bunkering monitoring works in MANTRAZ

MANTRAZ measures the fuel as it flows in, for every bunker. For each delivery you get:

• flow rate
• density
• temperature
• mass
• volume

The running total is refreshed every 60 seconds, so the delivery can be followed while it is still in progress rather than reconstructed at the end.

An overflow alarm for the crew and the office

Watching the tank level by eye during a long delivery is tiring work, and a moment's distraction is enough for a tank to overfill. When the tank nears its limit, MANTRAZ sends an overflow alarm to both the crew and the office. The people on board get the warning where they can act on it, and the office knows about it too.

Every bunker, ready to export

Once the bunker is done, its data is ready to export to Excel. That gives the office a clean record of each delivery for its own files, for internal checks, or for a conversation with the supplier.

What happens after the bunker

Bunkering monitoring is the first half of the picture. After every bunkering, MANTRAZ's bunkering log sets the target quantity against the flowmeter total and the tank sounding before and after, and shows the discrepancy in KL and percent. Each bunker is also added to the vessel's running Remain On Board balance, so fuel on board stays up to date once the delivery is done.

Who uses it

Crews use the live total and the overflow alarm during the delivery itself. Fleet managers and office teams use the measured record to follow bunkers across the fleet without waiting for documents to come back from the vessel. Anyone who has to reconcile fuel purchases gets figures that were measured, not estimated.

See it on the map

The bunkering chapter on the MANTRAZ homepage runs a demo bunker, with the live total climbing as fuel flows in. To see bunkering monitoring on your own vessels, contact the team for a demo.