Kikfin Shark Jetpack Wearable Underwater Propulsion System to Deep Dive and Swim at 6 Mph - Yanko Design
Briefly

Kikfin Shark Jetpack Wearable Underwater Propulsion System to Deep Dive and Swim at 6 Mph - Yanko Design
"However, an Israeli startup believes it's much simpler to provide a harnessed jetpack that lets people fly underwater, rather than through the air, at speeds of up to 5.8 mph. It's called the Shark Jet Pack and is designed to use water jets attached to the back, enabling wearers to dive deep into the sea and swim alongside sharks and other marine life. The KikFin Shark Jetpack features two pectoral-inspired fins, which help the device mimic the movements of fast sea creatures like sharks, thus the name."
"The KiKFin Shark is harnessed around the shoulder and meant to rest on your back like a jetpack designed for flying. It is lightweight, so you won't feel its bulk on the shoulder and back. It tips the scale at 13 pounds (slightly over 6 kgs) with the battery onboard, and can thrust you through the water at blistering speeds that you can control from the glove in the hand."
"The top speed we are talking about is 5.8 mph, which is made possible by two cylindrical thrusters on the back. Each of them contains a propeller to provide the propulsion. The cylinders are connected to the pectoral fins for stability. The jetpack can allow you to dive down to depths of 131 feet (40 m), so it's not just for shallow swimming in any way."
The KiKFin Shark Jetpack is a harnessed underwater propulsion device that straps to the shoulders and rests on the back. The rig weighs about 13 pounds with the battery onboard and provides hands-free movement through water using two cylindrical thrusters and pectoral-inspired fins. The cylinders house propellers and connect to fins for stability while mimicking fast sea creatures' movements. A glove-mounted controller offers three speed modes, and head-tilt sensors steer the device by adjusting body position and thrusters. The jetpack enables dives to about 131 feet (40 m) and top speeds near 5.8 mph.
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