April 2016 Newsletter
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Pressure Activated Switches

As an underwater vehicle transits from the surface to the seafloor, then back again, it can be useful to have a simple switch to turn things on or off. This small pressure activated switch is built around a super strong, corrosion proof Ti 6-4 body and a high reliability mechanical switch rated for over 100,000 actuations. The switch works with either a sphere or a flat endcap, turning a circuit on or off between 2-3 atmospheres depth differential, then tolerating the high over-pressure of any ocean trench. We built them to turn on our recovery Beacon Board as a benthic lander approaches the surface, while other designers saw them as a safety switch for underwater lasers, arming circuits, or other functions. Learn more about our full line of pressure-activated switches, including PBOF models.

Self-sealing Vacuum Purge Ports
Pulling a vacuum on a housing is as easy as filling a bicycle tire when you use a Global Ocean Design self-sealing vacuum purge port. When the vacuum hose is removed an interior spring-loaded valve in the fitting closes, holding up to 10-psi interior vacuum. The technicians have all the time they need to clean, inspect and re-seal the pressure proof cap with a beefy 2-015 o-ring and 7/16-20 thread. Leaving a partial vacuum on the interior also pre-loads the housing o-rings prior to launch. We’ve thought of everything, including a half-dove tail groove in the pressure proof cap that holds the o-ring in place upside down.
Now in Print
Morris, Rob, EdgeTech, and Kevin Hardy, Global Ocean Design, “Unique Applications of Acoustic Releases”, Ocean News & Technology, April 2016.
Aguilera, Mario, “New Agreement Enlists Citizen Scientists in Support of Scripps Exploration at Sea”, Scripps News, Scripps Institution of Oceanography, February 4, 2016.

The story describes a new collaboration, initiated by Kevin Hardy and Patty Elkus, with the SeaKeepers International to provide donated ship time on yachting vessels for innovative science and technology development.
Invite Us to Visit!
We are on the road frequently visiting our customers. Contact us if you'd like us to stop by when we're in your area to see how Global Ocean Design products can help you succeed at sea.
Copyright © 2016 Global Ocean Design, All rights reserved.

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