IEEE Consumer Electronics Magazine - September/October 2022 - 94

Feature Article: Wearable Freedive Computer
Wearable Freedive
Computer With Acoustic
Communication
Benjamin Bube and Heinrich Klocke
TH K€oln, University
Ana Maria Lara-Palma and
Bruno Baruque Zanon
Universidad de Burgos
Abstract-The spread and performance of freedivers have increased enormously in recent
years. In addition to the ever-increasing depth, diving time also increases. Due to this,
even relative beginners dive into depths in the no longer visible area. Regardless of the
depth or duration of the dive, the freediver needs to be continuously monitored so that the
safety freediver can react quickly. To address this problem, we present the Wearable
Apnea Divecomputer with Acoustic Communication (WADAC). The device collects and
displays basic data about a dive is easily expandable and enables digital underwater
communication between several freedivers. At the time of writing this contribution, the
data that can be transmitted contains depth, time, heart rate, and temperature. The
prototype is waterproof to 250mand enables a data transmission range of 200m
regardless of direction. Results from tests in the water with the help of a subsequent
Usability evaluation questionnaire showed, based on 14 freedivers, that the interest and
novelty toward the WADAC compared with 452 other products is significant.
& FREEDIVING IS THE most natural form of diving,
limited only by the ability to hold your breath.
A study by the Divers Alert Network from
2018 included 855 reported accidents that
occurred while freediving. Of these, 78% were
fatal.1 The data collected are only a fraction of
Digital Object Identifier 10.1109/MCE.2021.3096795
Date ofpublication 26 July 2021; date ofcurrent version 17
August 2022.
94
2162-2248 ß 2021 IEEE
the accidents that occurred during this period,
but clearly show the dangers and challenges during
freediving.
The term freediving can also vary greatly so
that both top athletes and snorkelers appear in
these statistics. A likely not insignificant part of
the accidents probably occurred among noncertified
freedivers.
However, recreational freediving is the most
popular and, in some aspects, the most dangerous
kind of freediving.2 While every recreational
Published by the IEEE Consumer Technology Society
IEEE Consumer Electronics Magazine

IEEE Consumer Electronics Magazine - September/October 2022

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