Engineering Design and Development Jordan O’Boyle Brian Roache Paul Wiedorn

The Problem Statement 135,000 freedivers from 9 developed nations 1 out of 1600 (USA) will die free-diving. Free divers tend to be cost conscious and prefer to be unencumbered by equipment and often tether a dive buoy to their spear gun. Death is often by shallow water blackout. Other causes include entanglement, blood loss, loss of vision, and hazardous encounters with marine life. Promptly alerting the dive buddy is critical.

Shallow Water Blackout (SWB) Prolonged underwater breath holding can be deadly. Here’s what happens

Survey Says… 7 novice, 9 int. & 4 pro 9 of 20 never dive alone, 6 sometimes(!), 10 w/ buddy, and only 1 with group. CONCLUSION: Market to buddy divers. 9 light headed or suffered SWB; 11 never. CONCLUSION: SWB is a valid problem. 7 of 20 entangled. CONCLUSION: Entanglement is valid. Concern for SWB 2.9 (of 5), for entanglement CONCLUSION: Solve both. 9 would wear a device, 10 maybe, 1 says no. CONCLUSION: Has to be well designed to actually be used. Equip.: 3< $100, in $100 to $500 and $500 to $1000. Only 1 over $2, will be spending < $100 this year, 8 $100 to $500 and 3 over $500. CONCLUSION: Keep cost <$100 (or maybe <$500).

Generate Ideas

Generate and Defend Solution Concepts— Device that will alert the dive buddy Releasable Float CO 2 inflatable float that whistles on ascent Tether helps buddy locate diver Manual release for entanglement Automatic release for SWB? Conclusion—tell Carter Floats Switch on Speargun Grip keeps switch closed Underwater cable replaces float line Audible & visual alarm on dive buoy Upon release – Selectable time delay – 5 second beep and then, – Full Alarm Also…

Construct Prototype VEX Cortex Alarm & Light 3D Printed spear gun grip and added VEX switch 3D print case to mount on dive buoy w/ flag. Another alarm in keep it safe.

Constructing the Sea Siren prototype and Developing the Testing Plan Prototype Testing Trigger Function Sound Travel Ergonomics Ease of use Accidental Alarms

Sea Siren

Questions?