pletely independently of it. Applications include monitoring the deployment of subsea structures as they are lowered to the seabed and remote environmental monitoring. The high speed data telemetry capabili-ties of Sonardyne’s 6G instruments en-Complete HMS-620 Portable Seismic Systemsure that sensor data can be streamed to 6HQVRUV6\VWHPV6HUYLFH(shown with transducer suspended on display frame)a user’s desktop in real-time. TMFSI’s HMS-620 Bubble Gun ultra-portable seismic system is perfect for small boat shallow-water surveys. www.sonardyne.comIts proven technology provides superior signal penetration through coarse sand, gravel tills, and other dif? cult to penetrate sediments; and it operates in salt or fresh water. Data collected with the HMS-620 rivals that of Teledyne TSS Launches AHRS and much larger, heavier, and more expensive air-gun, boomer, and sparker systems. Its compact size makes it easily deployable without the need for heavy machinery. It runs on either a small generator or optionally on INS Systemsmarine batteries, and it does not need an air compressor or other support infrastructure.Following a two-year development pro-gram, Teledyne TSS previewed a com-Falmouth Scienti? c, Inc. plete new family of advanced AHRS 1400 Route 28A, PO Box 315and INS (Inertial Navigation and Atti-Cataumet, MA 02534-0315, USAtude and Heading Reference Systems) 4EL