Simrad EQ33-2 Instruction Manual page 86

Appendix A-2 EQ33-2 Glossary of terms
MENU – the selection of main menus will be shown in the upper part of the
screen. Leaf through the menus by means of the cursor key and the [ENT]
key, or use the numerical keys to activate one of the menus.
NMEA – National Marine Electronics Association. The NMEA is an organi-
zation of manufacturers of marine electronics equipment. They have adopted
the NMEA0183 as a standard for communications between various types of
marine electronic equipment.
TFT – Thin-Film Transistor (Active matrix) display.
Transducer – the transducer serves as the acoustic "loudspeaker" and "micro-
phone" to send and receive the signals through the water. They are most
often made from ceramic elements carefully built into a robust housing. The
ceramic elements change shape when a voltage is applied across them (when
the EQ33-2 transmits a signal), and they also generate a voltage when they
encounter sound waves (as when the EQ33-2 is receiving an echo).
XTE – Cross-Track-Error (-Distance), measured magnitude of the position
error perpendicular to the intended track line.