1 A normal pregnancy lasts about 40 weeks and is grouped into three trimesters.  Symptoms of early pregnancy include the absence of menstrual periods, breast changes, tiredness, nausea, mood swings, or other symptoms.
What is ENCODING ALTIMETER? An altimeter designed for automatic reporting of altitude to air-traffic control. A special encoding disk within the instrument rotates in response to movement of the aneroid capsules, and transmits a signal which is amplified, fed to the aircraft. ALTIMETER.
5237 Series. The Altimeter is designed for use in aircraft to help the pilot determine altitude, the height above a reference point (generally mean sea level). The Altimeter measures existing atmospheric pressure, which varies with altitude. Based on the assumption of Standard Day conditions of temperature and air pressure, the altimeter translates this pressure into a height-above-sea-level value, which is indicated on the dial of the instrument in feet.