Ever wondered why your air consumption spikes unpredictably during certain dives? The answer might be written in your own physiology—data that traditional dive computers completely miss. In this episode, Marcus Okafor breaks down biometric dive computers that track heart rate, skin temperature, and breathing patterns in real time, explaining which features actually deliver on their promises and which fall short. Whether you're looking to optimize performance, manage underwater stress, or simply understand why some dives feel harder than others, this guide helps you decide if biometric technology is worth the investment for your diving style.

• Optical heart rate sensors work dramatically differently based on conditions—tropical water with bare skin contact shows accuracy within 2-3 beats per minute, while cold water over a 5mm wetsuit ...