second-trip echo

echo location/echo ranging

trip a mine

trip map

trip wire

trip wire initiated grenade (TWIG)

trip-flare

average trip length

return trip

trip

round trip

single trip

single-strand trip wire

parachute trip flare

E – ECHO

echo (returned signal)

echo depth finder

echo sounder

echo sounding

bottom echo

bottom echo signal

coherent echo

coherent echo modulation and detection

Doppler echo indicator

echo area

echo frequency

echo intensity

mirror-reflection echo

precipitation echo

echo

Echo (phonetic alphabet)

target echo

skin echo