Teledyne Webb Research's Autonomous Profiling Explorer (APEX®) Deep, dives to a record 6,000 meters. The record drive, in the Puerto Rico trench was launched from the R/V Kruger B out of San Juan, starting its dive the afternoon on February 25, 2013. Approximately twenty two hours later the float surfaced and transmitted its data over the Iridium satellite network. APEX floats are based on a buoyancy engine and have been commercially available since founder Douglas Webb opened Webb Research in 1982. APEX floats descend to a programmed depth where they become neutrally buoyant and drift.