A Pacific OBSIP Facility

Instrument construction and testing The most recent modification to the Long-Period fleet is a syntactic-only floatation design. This mod was required toward the deep deployment of the Forsyth et al. deployment in the NW Pacific (described below). Deployment depth are in excess of 6 km for over a year-long duration. Similar deployments off Hawaii (i.e. PLUME) saw a series of catastrophic glass ball floatation implosions, thus there was concern of the added risk invovled in these deployments. Using a stackable float design, and minimal modification to the existing LP frame, a subset of the SIO fleet is now outfitted with a more robust, long-term design solution for deep deployments. We expect all future instrument construction and upgrades to exclusively use a syntactic-only design.