- E -
	Earth Observing System Earth remote sensing Earth-ionosphere waveguide Earthquakes Echo Echo interference Echo sounding Echo suppression Echolocation Eddies Eddy currents Editorial Education Eigenfunctions/eigenvalues Eigenstructure assignment Eigenvalues Eigenvalues/eigenfunctions Eigenvalues/eigenvectors Eigenvector methods Eigenvectors Elastic sediments Elastics Electric fields Electrical charge Electrochemical devices Electrochemical measurements Electrochemical processes Electrodes Electromagnetic (EM) measurements Electromagnetic (EM) radiation Electromagnetic (EM) scattering Electromagnetic (EM) scattering by rough surfaces Electromagnetic (EM) transient analysis Electromagnetic analysis Electromagnetic atmospheric interference Electromagnetic compatibility Electromagnetic interference Electromagnetic interference, atmospheric Electromagnetic noise/interference, radiated	Electromagnetic propagation Electromagnetic propagation in anisotropic media Electromagnetic scattering by nonhomogeneous media Electromagnetic scattering by periodic structures Electromagnetic scattering, inverse problem Elephants trunk ELF antennas ELF radio communication ELF radio propagation Ellipsoids Empirical orthogonal functions Encoding Energy resources Energy systems Entropy functions Envelope detection Environment adaptation Environmental monitoring Environmental visualization Environmentally adaptive Equalizers Ergonomic devices Erosion Error analysis Error correction codes Error estimate Error minimization Error statistics Error-correction coding ESPRIT Estimating geoacoustic parameters Estimation Evidence combination Expendable Expert systems Explosions Explosive acoustic sources Extended towed array measurements (ETAM) Extended towed array measurements (ETAM) algorithm

- F -
	Fading Fading channels Fast Fourier transform (FFT) Fault detection Feature based tracking Feature extraction Feature extraction techniques Feature fusion Feature optimization Feature-based modeling Feedback Feedback systems Feedforward systems FEM Fest FFT (fast Fourier transform) Fiber-optics probe Filled polymers Filtering Filtering theory Finite difference methods Finite-element method (FEM) FIR digital filters FIR filters Fish Fish detection Fish identification Fisheries acoustics Flexible manipulators Flexible robot Float buoy Floating caisson construction method Flow disturbance Flow measurement	Flow simulation Fluctuation exploitation gain Fluid flow Fluid flow measurements Fluorescence Fluorimetry Fluxgate compass FM FM radar Force and slip sensing Force control Force sensors Forward looking Forward loss Forward problem Forward scattering Fourier transforms Freely drifting sensor array Frequency analysis Frequency dependence Frequency diversity Frequency estimation Frequency measurement Frequency-division multiple-access Frequency-domain analysis Frequency-domain synthesis Frequency-hop communication Frequency-shift keying Fuel cells Functions Fuzzy Fuzzy control Fuzzy goal seeking Fuzzy logic Fuzzy systems

- G -
	Gamma-ray spectroscopy Gaussian channels Gaussian noise Gaussian processes Generalized correlation beamformer Genetic algorithm (GA) Geoacoustic inversion Geoacoustic model Geoacoustic properties Geoacoustics Geologic measurements Geological Geomagnetic Geomagnetism Geometric distortion Geometrical acoustics Geometrical optics (GO) Geophysical database Geophysical inverse problems Geophysical measurements Geophysical signal processing Geophysical tomography Geophysics Geophysics computing	Georges bank GEOSAT GIS Global system for mobile communications (GSM) GLORIA Governmental activities/factors Governmental factors Governmental regulations GPS (Global Positioning System) GPS Doppler processing Gradient methods Graphics Gravity Gravity waves Gray scale Gray-level co-occurrence Green's functions Ground-wave propagation Grounding Growlers Guidance and control Gyromagnetic Gyroscopes