We have mapped a quarter of the ocean floor, but not the tank on your roof

TL;DR: Humanity has now mapped 27.3% of the entire ocean floor to modern standards, up from just 6% in 2017, according to the Seabed 2030 project. We are measuring water at a planetary scale. Yet most organisations have mapped 0% of the water assets they own: the tanks, wet wells, culverts and chambers on their own sites still run on manual dips and quarterly visits. The measurement gap that actually costs you money is not at the bottom of the ocean. It is on your own site, and continuous radar level monitoring closes it.

Key takeaways

• As of June 2025, 27.3% of the world’s ocean floor has been mapped to modern standards, up from 6% in 2017 (Seabed 2030).
• We invest enormously in measuring water at global scale, while individual sites often have no live data on the assets they own.
• An unmonitored tank, wet well or chamber is a blind spot that surfaces as an overflow, a run-dry, or a surcharge, after the fact.
• Continuous radar level monitoring turns an owned asset from a quarterly guess into a live, audit-ready signal.
• The data gap that matters to your operation and your budget is local, not oceanic.

The number: 27.3% of the ocean floor, mapped

On World Hydrography Day 2025, the Seabed 2030 project announced that 27.3% of the world’s ocean floor had now been mapped to modern standards, an increase of more than four million square kilometres in a single year. In 2017 the figure was 6%. It is a genuinely remarkable feat of measurement: a global, collaborative effort, backed by The Nippon Foundation and GEBCO, to chart the most inaccessible terrain on the planet to a consistent standard, and to make the data freely available.

The contrast: we map the ocean, but not the tank on the roof

Hold that achievement next to a typical estate, hospital, factory, or housing site. The water assets it owns and depends on every day, the cold-water storage tank, the break tank, the wet well under the car park, the attenuation tank, the culvert at the boundary, are very often not measured at all. Their level is checked by someone climbing a ladder with a dip tape, if it is checked at all, on a schedule measured in weeks. Between those checks, the asset is a blind spot. We have better continuous data on the floor of the Pacific than most organisations have on a tank twenty metres from their own front door.

What “blind” actually costs

A blind spot is not a neutral state. It is a cost waiting to be realised. A storage tank with no level alarm overflows, wasting water and risking damage, or runs dry and interrupts supply. A wet well with no monitoring surcharges and spills before anyone knows the pumps are struggling. An attenuation tank that is silting up is invisible until it fails to attenuate. In every case, the first sign is the failure itself, because there was no signal in between. The cost is paid in wasted water, emergency call-outs, damage, downtime, and sometimes a regulator’s letter, all of it avoidable with a measurement the organisation simply did not have.

What continuous level monitoring changes

The same principle that drives ocean mapping, that you cannot manage what you have not measured, applies at the scale of a single chamber. The AQUAIOT Radar measures level without contact, through foam, vapour and debris, to a few millimetres, and streams it to the AQUAIOT Cloud. A tank that is filling too fast, a wet well that is rising toward its overflow, a culvert that is backing up, each becomes a live reading and a threshold alert, sent by email, SMS or voice call, while there is still time to act. Mapping the ocean takes ships and sonar and years. Mapping your own assets takes a non-contact sensor and an afternoon.

It also closes the evidence gap. Just as the value of the seabed map is the shared, consistent record, the value of continuous level monitoring is the audit-ready history: a timestamped record of how every asset behaved, available when an insurer, a regulator, or a board asks. The blind spot becomes a documented, defensible position.

The point: the data gap that matters is local

It is worth celebrating that the world has charted more than a quarter of the ocean floor. But for an organisation running real water assets, the more useful question is simpler and closer to home: how much of what you own can you actually see, right now, without sending someone to look? For most, the honest answer is very little. The gap is not technological, the sensors exist and are inexpensive. It is simply that no one has instrumented the asset yet.

Close the local data gap before it closes a site. Talk to AQUAIOT about continuous radar level monitoring for the tanks, wet wells and chambers you depend on.