Heinrichs Weikamp

Heinrichs Weikamp OSTC Sport

A stripped-down, AA-battery OSTC with magnetic buttons built for gloved recreational use.

Open BLE sync (libdivecomputer)

Syncs wirelessly with third-party apps (Subsurface, Currents, etc.), not just the manufacturer app.

Heinrichs Weikamp OSTC Sport
$490
Released2019
Max depth rating120m
AlgorithmBühlmann ZHL-16C with optional gradient factors
Air integrationnone
Wireless—
DisplayColor LCD
Batteryuser-replaceable
Digital compass—
Gas typesair, nitrox
Gas switches—
CCR capableNo
Pros
  • Standard AA battery, up to 150 hours of dive time with SAFT cells
  • Magnetic, user-maintainable buttons that work with thick gloves
  • Nitrox up to 100% O2 supported out of the box
Cons
  • No GPS, air integration, or wireless charging
  • Trimix and CCR require a paid online firmware upgrade (~€120)
  • Niche brand with a smaller dive-shop support network than the majors

The OSTC Sport strips Heinrichs Weikamp’s open-source platform down to a simpler, AA-battery recreational computer with magnetic buttons, leaving trimix and CCR support as a paid unlock for divers who outgrow single-gas diving.