Table 2. List of Acronyms for Vents Program Scientific 
Information Model.

ATV	Advanced Tethered Vehicle (U.S. Navy).

CM	Current Meter. See Cannon et al. (1995).

CTD	Conductivity-Temperature-Depth.

DBMS	Database Management System.

EQ	Earthquake.

ESC	Electronic Still Camera.

GIS	Geographic Information System.

GPS	Global Positioning System

HARU	Hydrophone Acoustic Research Underwater (recently 
	developed at NOAA-PMEL, Newport, OR).

MTR	Miniature Temperature Recorder. See Baker and Cannon 
	(1993).

NOAA 	National Oceanic and Atmospheric Administration.

PMEL	Pacific Marine Environmental Laboratory (Newport, OR and 
	Seattle, WA)

ROPOS	Remotely-Operated Platform for Ocean Science (Fisheries and 
	Oceans Canada). See Embley et al. (1995).

ROV	Remotely-Operated Vehicle.

SB	Sea Beam. See Chadwick et al. (1995a).

SeaMARC	Sea Mapping and Remote Characterization. See Applegate 
	(1990).

SIM	Scientific Information Model.

SOSUS	SOund SUrveillance System (U.S. Navy). See Fox and 
	Hammond (1994).

T-Phase	Tertiary-phase (seismically generated acoustic waves that 
	propagate over great distances in the oceanic sound channel). 
	See Dziak et al. (1995) and Fox and Hammond (1994).

USGS	United States Geological Survey.

VSM	Volcanic System Monitor. See Fox (1993).

WOCE	World Ocean Circulation Experiment. See Lupton et al. 
	(1985).

XTS	Extensometer. See Chadwick et al. (1995b).