Connected tide clock movement — an OEM solution for instrument makers

The HMC movement (HMC, for Horloge des Marées Connectée — the connected tide clock) is an OEM solution for clock and instrument manufacturers. It lets you offer a connected, self-contained precision tide clock under your own brand, in your own case. The OEM supplier stays behind the scenes — you keep the entire relationship with the end customer.

What the movement contains

The HMC movement ships as a ready-to-integrate circuit board, available in production runs, carrying:

What it gives the manufacturer

Connected to the HMC prediction servers, the movement computes the exact hand position in real time from the harmonic algorithms of CNES, the French national space agency — the same class of hydrographic model that oceanographic institutes rely on. No manual setting, no drift: the instrument stays accurate for years. You move upmarket and offer a premium precision instrument that stands apart, without building the technology in-house.

Why it is not a conventional tide clock

A mechanical tide clock runs on a fixed lunar interval of roughly 12 hours and 25 minutes. That is an average, not a prediction: real tides shift day by day with the Moon, the Sun and the shape of the coast, so the hand drifts away from the water. The HMC movement does not approximate the tide — it computes it, for the specific port your customer chooses, and resynchronises on its own.